Clinical Digestive System Quiz
Questions and Answers
- 1.
Which of the following is a function of the small intestine?
- A.
Stores undigested food
- B.
Completes the dgestion of food
- C.
Absorbs excess water from the undigested food
- D.
Passes out undigested food through the anus
Correct Answer
B. Completes the dgestion of foodExplanation
The small intestine completes the digestion of food. It is responsible for breaking down nutrients into smaller molecules that can be absorbed by the body. This is done through the secretion of enzymes and the mixing of chyme with bile and pancreatic juices. The small intestine plays a crucial role in the absorption of nutrients, such as carbohydrates, proteins, and fats, into the bloodstream for distribution to the cells of the body.Rate this question:
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- 2.
Digested food is absorbed into the blood vessels after passing through the walls of the __________________.
- A.
Anus
- B.
Mouth
- C.
Stomach
- D.
Small intestine
Correct Answer
D. Small intestineExplanation
The small intestine is responsible for the absorption of digested food into the blood vessels. It is a long tube-like organ where the majority of digestion and absorption of nutrients takes place. The walls of the small intestine are lined with tiny finger-like projections called villi, which increase the surface area for absorption. As food passes through the small intestine, nutrients are absorbed into the bloodstream through these villi and transported to the rest of the body for energy and other functions.Rate this question:
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- 3.
If the large intestine is missing in our digestive system, _______________________________________________.
- A.
Food cannot be digested
- B.
The body will not get nutrients
- C.
Undigested food will not be passed out
- D.
Water is not absorbed from undigested food
Correct Answer
D. Water is not absorbed from undigested foodExplanation
If the large intestine is missing in our digestive system, water is not absorbed from undigested food. The large intestine is responsible for absorbing water from the undigested food that passes through it. Without the large intestine, this process cannot occur, leading to the inability to absorb water from undigested food.Rate this question:
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- 4.
Which two systems work together to allow us absorb nutrients and transport them to all parts of our body
- A.
Digestive and skeletal systems
- B.
Circulatory and muscular systems
- C.
Digestive and circulatory systems
- D.
Respiratory and circulatory systems
Correct Answer
C. Digestive and circulatory systemsExplanation
The digestive system breaks down food into nutrients that can be absorbed by the body. The circulatory system, specifically the blood vessels, transports these nutrients to all parts of the body. Therefore, the digestive and circulatory systems work together to allow us to absorb nutrients and transport them to all parts of our body.Rate this question:
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- 5.
Reflux occurs when :
- A.
Acid from the stomatch enters the esophagus
- B.
The large intenstine becomes twisted
- C.
The stomach lining deteriorates and the gastric juices form a hole in the wall of the stomach
- D.
The small intestine pokes through the abdominal wall
Correct Answer
A. Acid from the stomatch enters the esophagusExplanation
Reflux occurs when acid from the stomach enters the esophagus. This happens when the lower esophageal sphincter, a ring of muscle that normally keeps the stomach contents from flowing back into the esophagus, becomes weak or relaxes. When this occurs, the acidic stomach contents can flow back up into the esophagus, causing symptoms such as heartburn, regurgitation, and a sour taste in the mouth. Reflux can be caused by various factors, including certain foods, obesity, pregnancy, and certain medications. Treatment options for reflux include lifestyle changes, medication, and, in severe cases, surgery.Rate this question:
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- 6.
The duct connects the gall bladder to the small intestine
- A.
Pancreatic duct
- B.
Cystic duct
- C.
Loop of henle
- D.
Bile duct
Correct Answer
D. Bile ductExplanation
The bile duct is the correct answer because it is the duct that connects the gall bladder to the small intestine. Bile, which is produced by the liver and stored in the gall bladder, is transported through the bile duct to the small intestine, where it aids in the digestion and absorption of fats. The pancreatic duct is responsible for carrying pancreatic enzymes to the small intestine, the cystic duct connects the gall bladder to the common bile duct, and the loop of Henle is a part of the nephron in the kidney, unrelated to the gall bladder or small intestine.Rate this question:
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- 7.
Which of the following is NOT a task performed by the digestive system?
- A.
Secretion
- B.
Chemical breakdown
- C.
Mechanical breakdown
- D.
Absorption
Correct Answer
A. SecretionExplanation
The digestive system is responsible for breaking down food and absorbing nutrients, but secretion is not a task performed by the digestive system. Secretion refers to the release of substances such as enzymes, hormones, and mucus by various organs and glands in the body. While the digestive system does produce digestive enzymes, it is not primarily responsible for secretion. Instead, secretion is performed by specific organs and glands like the salivary glands, pancreas, and liver.Rate this question:
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- 8.
The villi are associated with the ______ and function in _____
- A.
Pancreas, release of hormones
- B.
Gall blader, production of bile
- C.
Small intenstine, absorption
- D.
Large intenstine, excretion
Correct Answer
C. Small intenstine, absorptionExplanation
The villi are finger-like projections found in the small intestine. They increase the surface area of the intestine, allowing for better absorption of nutrients from digested food. The small intestine is the primary site for nutrient absorption in the digestive system, making it the correct answer.Rate this question:
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- 9.
Contractions that move food are called :
- A.
Chyme
- B.
Peristalsis
- C.
Reflux
- D.
Amylase
Correct Answer
B. PeristalsisExplanation
Peristalsis is the correct answer because it refers to the contraction and relaxation of muscles in the digestive tract that helps move food through the system. This process allows for the efficient digestion and absorption of nutrients. Chyme is the semi-liquid mixture of partially digested food and digestive juices in the stomach. Reflux is the backward flow of stomach acid into the esophagus, causing heartburn. Amylase is an enzyme that helps break down carbohydrates in the digestive system.Rate this question:
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- 10.
Helpful bacteria are housed in the :
- A.
Large intestine
- B.
Bladder
- C.
Kidney
- D.
Stomach
Correct Answer
A. Large intestineExplanation
The large intestine is the correct answer because it is the part of the digestive system where helpful bacteria reside. These bacteria help in the breakdown of certain substances, such as dietary fiber, that cannot be digested by the body alone. They also produce vitamins and help in the absorption of nutrients. The bladder, kidney, and stomach do not house helpful bacteria. The bladder stores urine, the kidney filters waste from the blood, and the stomach is primarily responsible for digestion.Rate this question:
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- 11.
An ulcer occurs when :
- A.
Acid from the stomatch enters the esophagus
- B.
The large intenstine becomes twisted
- C.
The stomach lining deteriorates and the gastric juices form a hole in the wall of the stomach
- D.
The small intestine pokes through the abdominal wall
Correct Answer
C. The stomach lining deteriorates and the gastric juices form a hole in the wall of the stomachExplanation
When the stomach lining deteriorates and the gastric juices form a hole in the wall of the stomach, an ulcer occurs. This happens when the protective layer of the stomach lining is damaged, allowing the acidic gastric juices to come into direct contact with the stomach wall. Over time, the corrosive effect of the gastric juices leads to the formation of a hole or an open sore, which is known as an ulcer.Rate this question:
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- 12.
The liver (pictured above) has what function?
- A.
Secretes bile
- B.
Detoxifies blood
- C.
Stores and releases nutrients
- D.
All of the above
Correct Answer
D. All of the above -
- 13.
Which of the following is NOT part of the alimentary canal?
- A.
Stomach
- B.
Gall bladder
- C.
Esophagus
- D.
Large intestine
Correct Answer
B. Gall bladderExplanation
Alimentary canal = food pathwayRate this question:
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- 14.
Two types of digestion are?
- A.
Automatic and enzymatic
- B.
Physical and chemical
- C.
Mechanical and Chemical
- D.
Alchemical and motorized
- E.
None of the above
Correct Answer
C. Mechanical and ChemicalExplanation
The correct answer is mechanical and chemical. Mechanical digestion involves the physical breakdown of food into smaller pieces through actions like chewing and churning in the stomach. Chemical digestion, on the other hand, involves the breakdown of food molecules into smaller nutrients through the use of enzymes and other chemicals in the digestive system. Both types of digestion are essential for the proper breakdown and absorption of nutrients in the body.Rate this question:
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- 15.
Which one of the following is an accessory organ of digestion?
- A.
Teeth
- B.
Spleen
- C.
Appendix
- D.
Duodenum
- E.
None of these
Correct Answer
A. TeethExplanation
Teeth are considered accessory organs of digestion because they play a crucial role in the mechanical breakdown of food. They help to chew and grind food into smaller pieces, increasing its surface area for better digestion and absorption of nutrients. Additionally, teeth aid in the production of saliva, which contains enzymes that begin the process of chemical digestion. Therefore, teeth are essential in the initial stages of digestion, making them an accessory organ.Rate this question:
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- 16.
Which one of the following is not an organ of the digestive tract?
- A.
Pharynx
- B.
Ileum
- C.
Kidneys
- D.
Tongue
- E.
None of the above
Correct Answer
C. KidneysExplanation
The kidneys are not an organ of the digestive tract. The digestive tract consists of organs involved in the digestion and absorption of food, such as the pharynx, ileum, and tongue. However, the kidneys are part of the urinary system and are responsible for filtering waste products from the blood and producing urine.Rate this question:
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- 17.
The tongue is attached at the base of the mouth by?
- A.
Epiglottis
- B.
Frenulum
- C.
Hyoid bone
- D.
Tonsils
- E.
All of the above
Correct Answer
B. FrenulumExplanation
The frenulum is a small fold of tissue that attaches the tongue to the floor of the mouth. It helps to stabilize the tongue and allows for movement and flexibility. The other options, such as the epiglottis, hyoid bone, and tonsils, are not directly involved in attaching the tongue to the base of the mouth. Therefore, the correct answer is frenulum.Rate this question:
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- 18.
Food is prevented from entering the airways by the action of?
- A.
Pharynx
- B.
Nasopharynx
- C.
Epliglottis
- D.
Sphincter muscles
- E.
None of the above
Correct Answer
C. EpliglottisExplanation
The epiglottis is a flap of tissue located at the base of the tongue that prevents food from entering the airways. When we swallow, the epiglottis folds down over the opening of the windpipe (trachea), directing food and liquids into the esophagus and preventing them from going into the lungs. This action ensures that our respiratory system is protected and allows us to safely consume food and drink without the risk of choking or aspiration.Rate this question:
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- 19.
Which is the correct order of food passing?
- A.
Esophagus,stomach,duodenum,anus
- B.
Esophagus, stomach,duodenum,colon
- C.
Esophagus,stomach,duodenum,rectum
- D.
Esophagus,stomach,duodenum,sphinctor
- E.
None of the above
Correct Answer
B. Esophagus, stomach,duodenum,colonExplanation
The correct order of food passing is from the esophagus to the stomach, then to the duodenum, and finally to the colon. The esophagus is the tube that carries food from the mouth to the stomach. The stomach is where food is broken down by stomach acid and enzymes. The duodenum is the first part of the small intestine where further digestion and absorption of nutrients occur. The colon, also known as the large intestine, is responsible for absorbing water and electrolytes and forming feces. Therefore, the correct answer is "Esophagus, stomach, duodenum, colon."Rate this question:
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- 20.
What kind of acid is found in the stomach?
- A.
Calcium chloric acid
- B.
Hydrochloric acid
- C.
Sulfuric acid
- D.
Calcium carbonate acid
- E.
All of the above
Correct Answer
B. Hydrochloric acidExplanation
Hydrochloric acid is found in the stomach. It is a strong acid that helps in the digestion process by breaking down food and killing bacteria. Calcium chloric acid, sulfuric acid, and calcium carbonate acid are not found in the stomach. Therefore, the correct answer is hydrochloric acid.Rate this question:
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- 21.
The esophagus connects what two things?
- A.
Trachea to stomach
- B.
Mouth to pharynx
- C.
Stomach to intestines
- D.
Pharynx to stomach
- E.
All of the above
Correct Answer
D. Pharynx to stomachExplanation
The esophagus connects the pharynx to the stomach. The pharynx is the part of the throat that connects the mouth and nasal cavity to the esophagus, while the stomach is the organ that receives food from the esophagus for digestion. Therefore, the correct answer is "pharynx to stomach."Rate this question:
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- 22.
Where does digestion of fat begins?
- A.
Mouth
- B.
Stomach
- C.
Duodenum
- D.
Large intestines
- E.
None of the above
Correct Answer
C. DuodenumExplanation
Digestion of fat begins in the duodenum. This is the first part of the small intestine where bile and pancreatic enzymes are released. Bile helps in breaking down fat into smaller droplets, while pancreatic enzymes called lipases further break down these droplets into fatty acids and glycerol. This process is essential for the absorption of fats in the small intestine. The mouth, stomach, and large intestines do not play a significant role in the digestion of fats.Rate this question:
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- 23.
The main function of villi is to?
- A.
Welcome peristalsis
- B.
Increase absorption
- C.
Increase absorption surface
- D.
Protect lumen from bacteria
- E.
None of the above
Correct Answer
C. Increase absorption surfaceExplanation
The main function of villi is to increase the absorption surface. Villi are tiny, finger-like projections found in the lining of the small intestine. They greatly increase the surface area available for absorption of nutrients from digested food. This increased surface area allows for more efficient absorption of nutrients into the bloodstream, ensuring that the body receives the necessary nutrients for energy and growth.Rate this question:
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- 24.
MAIN function of large intestines is?
- A.
Defecation
- B.
Absorption of vitamins and minerals
- C.
Absorb water
- D.
Synthesise vitamin k
- E.
Answers A and D
Correct Answer
C. Absorb waterExplanation
The main function of the large intestines is to absorb water. This is important for maintaining the body's hydration levels and preventing dehydration. The large intestines also play a role in the reabsorption of electrolytes and the formation of feces. Absorption of vitamins and minerals is primarily done in the small intestines, while the synthesis of vitamin K is mainly carried out by bacteria in the large intestines. Therefore, the correct answer is "Absorb water."Rate this question:
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- 25.
The endocrine gland of the pancreas secretes which hormone?
- A.
Glucose
- B.
Trypsinogen
- C.
Lipase
- D.
Pepsin
- E.
Insulin
Correct Answer
E. InsulinExplanation
Insulin is the correct answer because the endocrine gland of the pancreas is responsible for producing and secreting insulin. Insulin plays a crucial role in regulating blood sugar levels by allowing cells to take in glucose from the bloodstream. It also helps in the storage of excess glucose as glycogen in the liver and muscles. Insufficient production of insulin or the body's inability to use it properly can lead to diabetes, a condition characterized by high blood sugar levels.Rate this question:
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- 26.
Where does chemical digestion take place?
- A.
Mouth, gullet and stomach
- B.
Stomach, small intestine and anus
- C.
Mouth, stomach and small intestine
- D.
Mouth, small intestine, large intestine
Correct Answer
C. Mouth, stomach and small intestineExplanation
Chemical digestion takes place in the mouth, stomach, and small intestine. In the mouth, the process begins with the breakdown of food by enzymes present in saliva. In the stomach, gastric juices containing enzymes and acid further break down the food into smaller molecules. Finally, in the small intestine, digestive enzymes from the pancreas and bile from the liver help to further break down the food and absorb nutrients into the bloodstream.Rate this question:
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- 27.
Which of the following statements about the human digestive system is not correct?
- A.
Digestion starts at the mouth.
- B.
Digestive juice is not found at the gullet.
- C.
The digestive system ends at the small intestine.
- D.
The large intestine is connected to the small intestine and the anus.
Correct Answer
C. The digestive system ends at the small intestine.Explanation
The given statement that "The digestive system ends at the small intestine" is not correct. In fact, the digestive system continues beyond the small intestine into the large intestine. After the small intestine, the undigested food enters the large intestine, where water and electrolytes are absorbed, and the remaining waste material is formed into feces. The feces are then eliminated through the anus. Therefore, the correct answer is that the digestive system does not end at the small intestine.Rate this question:
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- 28.
Where does digestion begin?
- A.
In the stomach
- B.
In your mouth
- C.
In your large intestines
- D.
In your small intestines
Correct Answer
B. In your mouthExplanation
Digestion begins in the mouth. This is where the process of breaking down food begins, as the teeth chew and grind the food into smaller pieces. Additionally, saliva is produced in the mouth, which contains enzymes that start the chemical breakdown of carbohydrates.Rate this question:
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- 29.
What does saliva play in digestion?
- A.
Enzymes in saliva help to break down food.
- B.
It coats your stomach with protective lining.
- C.
It moves food through the intestine.
- D.
Saliva does not help with digestion.
Correct Answer
A. Enzymes in saliva help to break down food.Explanation
Saliva contains enzymes, such as amylase, that begin the process of breaking down carbohydrates in food. These enzymes help to break down complex molecules into smaller, more easily digestible ones. This initial breakdown of food in the mouth is important for the overall digestion process, as it prepares the food for further digestion in the stomach and intestines. Therefore, the correct answer is that enzymes in saliva help to break down food.Rate this question:
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- 30.
What is the main role of the large intestine?
- A.
The main role of the large intestine is to churn food around with enzymes.
- B.
The main role of the large intestine is to break down solid food.
- C.
The main role of the large intestine is to absorb water.
- D.
The main role of the large intestine is to mash and cut foods.
Correct Answer
C. The main role of the large intestine is to absorb water.Explanation
The large intestine plays a crucial role in the absorption of water from the remaining indigestible food matter that passes through the small intestine. It absorbs water and electrolytes, helping to form solid waste or feces. This process is essential for maintaining the body's water balance and preventing dehydration. The large intestine does not primarily churn, break down, mash, or cut food like the stomach or small intestine.Rate this question:
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- 31.
What is the baglike, muscular organ that mixes and chemically changes protein?
- A.
The baglike, muscular organ that mixes and chemically changes protein is the liver .
- B.
The baglike, muscular organ that mixes and chemically changes protein is the small intestine.
- C.
The baglike, muscular organ that mixes and chemically changes protein is the large intestine
- D.
The baglike, muscular organ that mixes and chemically changes protein is the stomach.
Correct Answer
D. The baglike, muscular organ that mixes and chemically changes protein is the stomach.Explanation
The stomach is the correct answer because it is a bag-like, muscular organ that mixes and chemically changes protein through the action of stomach acid and digestive enzymes. It has a unique structure and function that allows it to break down proteins into smaller molecules for further digestion and absorption in the small intestine.Rate this question:
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- 32.
What are chemicals that speed up the rate of chemical change?
- A.
Chemicals that speed up the rate of chemical change are starches.
- B.
Chemicals that speed up the rate of chemical change are fats.
- C.
Chemicals that speed up the rate of chemical change are carbohydrates.
- D.
Chemicals that speed up the rate of chemical change are enzymes.
Correct Answer
D. Chemicals that speed up the rate of chemical change are enzymes.Explanation
Enzymes are biological catalysts that speed up the rate of chemical reactions by lowering the activation energy required for the reaction to occur. They are proteins that bind to specific substrates and facilitate the conversion of substrates into products. Enzymes are highly specific and can be used repeatedly, making them efficient in speeding up chemical reactions. Starches, fats, and carbohydrates are not known to have this catalytic ability.Rate this question:
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- 33.
How long is an adult's small intestine?
- A.
An adult's small intestine is approximately 22 feet.
- B.
An adult's small intestine is approximately 30 inches.
- C.
An adult's small intestine is approximately 30 meters.
- D.
An adult's small intestine is approximately 5 feet.
Correct Answer
A. An adult's small intestine is approximately 22 feet.Explanation
The correct answer is that an adult's small intestine is approximately 22 feet. This is the average length of the small intestine in adults, which is responsible for the majority of nutrient absorption in the digestive system. The length allows for a large surface area for absorption to occur, maximizing the efficiency of digestion and nutrient uptake.Rate this question:
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- 34.
Bile is made in the ______________________.
- A.
Large intestine.
- B.
Stomach.
- C.
Liver.
- D.
Gall bladder
Correct Answer
C. Liver.Explanation
Bile is a greenish-yellow fluid that is produced in the liver. It plays a crucial role in the digestion and absorption of fats. The liver produces bile continuously and stores it in the gallbladder until it is needed. When food containing fat enters the small intestine, the gallbladder releases bile into the digestive tract to help break down the fats. Therefore, the correct answer is the liver.Rate this question:
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- 35.
Which organs help with the absorption of nutrients?
- A.
The organs that help with the absorption of nutrients are pancreas, liver, and gall bladder.
- B.
The organs that help with the absorption of nutrients are liver, heart, and spleen.
- C.
The organs that help with the absorption of nutrients are gall bladder, kidneys, and appendix
- D.
The organs that help with the absorption of nutrients are kidneys, liver, and gall bladder.
Correct Answer
A. The organs that help with the absorption of nutrients are pancreas, liver, and gall bladder.Explanation
The pancreas, liver, and gall bladder are involved in the absorption of nutrients. The pancreas produces enzymes that break down carbohydrates, fats, and proteins. The liver produces bile, which helps in the digestion and absorption of fats. The gall bladder stores and releases bile into the small intestine. Together, these organs play a crucial role in the absorption of nutrients from the food we consume.Rate this question:
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- 36.
The large intestine measures about _____________________.
- A.
One foot long.
- B.
30 feet long.
- C.
5 feet long.
- D.
22 feet long.
Correct Answer
C. 5 feet long.Explanation
The large intestine, also known as the colon, is the final part of the digestive system. It is responsible for absorbing water and electrolytes from undigested food, forming feces, and eliminating waste from the body. The average length of the large intestine in adults is around 5 feet long.Rate this question:
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- 37.
_______________ is the process by which food is broken down into substances that can be used by the cells in the body.
- A.
Peristalsis
- B.
Absorbtion
- C.
Elimination
- D.
Digestion
Correct Answer
D. DigestionExplanation
Digestion is the process by which food is broken down into substances that can be used by the cells in the body. It involves the mechanical and chemical breakdown of food in the digestive system, starting from the mouth where food is chewed and mixed with saliva, to the stomach where it is further broken down by stomach acids and enzymes, and finally to the small intestine where nutrients are absorbed into the bloodstream. Digestion is essential for obtaining energy and nutrients from food and for maintaining overall health and well-being.Rate this question:
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- 38.
The ___________ helps push food to the back of the mouth where it is swallowed.
- A.
Enzymes
- B.
Tongue
- C.
Saliva
- D.
Esophagus
Correct Answer
B. TongueExplanation
The tongue is responsible for pushing food to the back of the mouth where it is swallowed. It is a muscular organ that helps in the process of chewing and swallowing. The tongue moves the food towards the throat and into the esophagus, which leads to the stomach. Enzymes are substances that help in breaking down food, saliva is a fluid that aids in digestion, but neither of them directly push food to the back of the mouth.Rate this question:
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- 39.
____________ helps food glide through our digestive tract and it protects our organs from the digestive juices.
- A.
Mucus
- B.
Enzymes
- C.
Saliva
- D.
Tongue
Correct Answer
A. MucusExplanation
Mucus helps food glide through our digestive tract and protects our organs from the digestive juices. It is a slippery substance that is produced by the mucous membranes lining the digestive system. Mucus acts as a lubricant, making it easier for food to pass through the esophagus, stomach, and intestines. Additionally, it forms a protective barrier that prevents the digestive juices from damaging the delicate tissues and organs in our digestive system.Rate this question:
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- 40.
Once swallowed, the food passes through this muscular tube that connects the mouth to the stomach
- A.
Esophagus
- B.
Pancreas
- C.
Windpipe
- D.
Mouth
Correct Answer
A. EsophagusExplanation
The correct answer is esophagus. The esophagus is a muscular tube that connects the mouth to the stomach. It plays a crucial role in the digestive system by transporting food from the mouth to the stomach through a series of muscular contractions called peristalsis. Once food is swallowed, it travels down the esophagus and enters the stomach, where further digestion takes place. The esophagus acts as a pathway for food, ensuring that it reaches the stomach for proper digestion and absorption of nutrients.Rate this question:
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- 41.
This j-shaped sac that stores and further digests the food
- A.
Esophagus
- B.
Large Intestine
- C.
Villi
- D.
Stomach
Correct Answer
D. StomachExplanation
The correct answer is stomach because it is a j-shaped sac that stores and further digests the food. The stomach secretes digestive juices and enzymes to break down the food into smaller particles and mixes it with stomach acid to create a semi-liquid substance called chyme. The stomach also helps in the absorption of certain nutrients and plays a crucial role in the digestion process.Rate this question:
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- 42.
Nutrients from the digested food are absorbed into the bloodstream through tiny finger-like structures in this organ.
- A.
Small intestine
- B.
Gall bladder
- C.
Large intestine
- D.
Pancreas
Correct Answer
A. Small intestineExplanation
The small intestine is responsible for the absorption of nutrients from digested food into the bloodstream. It contains tiny finger-like structures called villi, which increase the surface area for absorption. These villi have blood vessels that allow the nutrients to be transported into the bloodstream. The gall bladder stores bile produced by the liver, the large intestine absorbs water and electrolytes, and the pancreas produces digestive enzymes, but none of these organs are primarily responsible for the absorption of nutrients.Rate this question:
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- 43.
Water is removed and the materials that are not digested move into this structure
- A.
Stomach
- B.
Large Intestine
- C.
Small Intestine
- D.
Gall bladder
Correct Answer
B. Large IntestineExplanation
The correct answer is Large Intestine. After digestion in the stomach and small intestine, water is removed from the remaining materials in the large intestine. The large intestine absorbs water and electrolytes from the undigested food, forming solid waste (feces) that is eventually eliminated from the body.Rate this question:
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- 44.
Located where the small intestine joins the large intestine, this organ was thought to have no function but it may play a role in our immune system.
- A.
Gall bladder
- B.
Pancreas
- C.
Appendix
- D.
Stomach
Correct Answer
C. AppendixExplanation
The appendix is a small organ located where the small intestine joins the large intestine. It was previously believed to have no function, but recent research suggests that it may play a role in our immune system. The appendix contains lymphoid tissue, which is involved in the production of immune cells and antibodies. This suggests that the appendix may help to protect against infections and contribute to our overall immune response.Rate this question:
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- 45.
Saliva breaking down starches in the mouth is an example of
- A.
Mechanical Digestion
- B.
Chemical Digestion
- C.
Peristalsis
- D.
Mucus
Correct Answer
B. Chemical DigestionExplanation
Saliva breaking down starches in the mouth is an example of chemical digestion. This is because saliva contains an enzyme called amylase, which helps to break down complex carbohydrates like starch into simpler sugars. Chemical digestion involves the breakdown of food into smaller molecules through the action of enzymes. In this case, the amylase in saliva chemically breaks down starches into smaller sugar molecules, facilitating the digestion process.Rate this question:
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- 46.
Stomach acid turning food into a soup-like substance is an example of
- A.
Mechanical digestion
- B.
Chemical digestion
- C.
Peristalsis
- D.
Enzyme activity
Correct Answer
B. Chemical digestionExplanation
Chemical digestion refers to the process in which enzymes and acids break down food into smaller molecules that can be absorbed by the body. In this case, stomach acid plays a crucial role in breaking down food into a soup-like substance by secreting hydrochloric acid. This acid helps in the digestion of proteins and also kills any harmful bacteria present in the food. Therefore, stomach acid turning food into a soup-like substance is an example of chemical digestion.Rate this question:
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- 47.
Which of the following does NOT take place in the mouth?
- A.
An enzyme is added to food.
- B.
The teeth break food into smaller pieces.
- C.
Nutrients are absorbed into the bloodstream.
- D.
Both mechanical and chemical digestion begin.
Correct Answer
C. Nutrients are absorbed into the bloodstream.Explanation
Nutrients are not absorbed into the bloodstream in the mouth. The absorption of nutrients occurs in the small intestine. In the mouth, mechanical digestion takes place as the teeth break food into smaller pieces, and chemical digestion begins as enzymes in saliva start breaking down carbohydrates.Rate this question:
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- 48.
The finger like structures lining the small intestine that absorb nutrients are called
- A.
Absorbtion
- B.
Peristalsis
- C.
Enzymes
- D.
Villi
Correct Answer
D. VilliExplanation
The finger-like structures lining the small intestine are called villi. These structures greatly increase the surface area of the small intestine, allowing for efficient absorption of nutrients from the digested food. The villi have specialized cells that absorb nutrients such as carbohydrates, proteins, and fats, and transport them into the bloodstream for distribution to the rest of the body.Rate this question:
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- 49.
Food moves through the digestive tract by wave-like muscle contractions which is called
- A.
Peristalsis
- B.
Digestion
- C.
Mucus
- D.
Stomach acid
Correct Answer
A. PeristalsisExplanation
Peristalsis is the correct answer because it refers to the wave-like muscle contractions that propel food through the digestive tract. These contractions help to push food along and break it down for digestion. Digestion, mucus, and stomach acid are all important components of the digestive process, but they do not specifically describe the mechanism by which food moves through the digestive tract.Rate this question:
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- 50.
Which of the following shows the correct pathway of food through the digestive tract?
- A.
Mouth, stomach, esophagus, small intestine, large intestine, rectum
- B.
Mouth, esophagus, stomach, small intestine, large intestine, rectum
- C.
Mouth, esophagus, stomach, large intestine, small intestine, rectum
- D.
Mouth, esophagus, small intestine, stomach, large intestine, rectum
Correct Answer
B. Mouth, esophagus, stomach, small intestine, large intestine, rectumExplanation
The correct answer is "Mouth, esophagus, stomach, small intestine, large intestine, rectum." This is the correct pathway of food through the digestive tract. Food enters the mouth where it is chewed and mixed with saliva. It then travels down the esophagus, a muscular tube, to the stomach where it is further broken down by stomach acid and enzymes. From the stomach, the partially digested food enters the small intestine where nutrients are absorbed into the bloodstream. The remaining undigested food then moves into the large intestine where water is absorbed and waste is formed. Finally, the waste is stored in the rectum before being eliminated from the body.Rate this question:
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