Digestive System Quiz Grade 6

Reviewed by Lindsey Block
Lindsey Block, PhD (Cellular & Molecular Biology) |
Lecturer | Molecular Biologist | Reproductive Scientist
Review Board Member
Lindsey, Ph.D. in cellular and molecular biology from the University of Wisconsin-Madison, specializes in Zika's impact on conception and preterm birth biomarkers. She completed courese on Advanced Cell Biology at the University of Illinois at Urbana-Champaign and Advanced Virology at University College Cork. Lindsey's accolades include three first-author papers, three fellowships, and active participation in five conference presentations. Currently associated with the University of Pennsylvania through a T32 NIH Postdoctoral Fellowship, she continues to contribute significantly to her field, combining academic rigor with practical research to advance understanding in reproductive health and prenatal care. Currently, she is a full time lecturer at Northwestern University - The Feinberg School of Medicine.
 , PhD (Cellular & Molecular Biology)
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  • 1/26 Questions

    What does the digestive system do?

    • The digestive system breaks down and handles food.
    • The digestive system pumps blood throughout the body.
    • The digestive system helps you breathe.
    • The digestive system helps you arms and legs move.
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About This Quiz

Are you curious about how human digestion works? Then take this grade 6 digestive system quiz today in order to know for sure! Think you can pass this Digestive System Quiz? Digestion is a process by which the human body absorbs nutrition. It helps in the growth and development of the body. Do you know about the various processes that entail the working of the digestive system in our body? Then, answer the multiple-choice ' Digestive System Quiz ' to test your knowledge and learn more along the way. Good Luck!

Digestive System Quiz Grade 6 - Quiz

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  • 2. 

    What are enzymes?

    • Enzymes are tiny food particles that can not be digested.

    • Enzymes are hormones.

    • Enzymes are chemicals that help break down food.

    • Enzymes are Inorganic compounds.

    Correct Answer
    A. Enzymes are chemicals that help break down food.
    Explanation
    Enzymes are chemicals that help break down food. This is the correct answer because enzymes are biological catalysts that speed up the rate of chemical reactions in the body, including the breakdown of food molecules. They are not tiny food particles, hormones, or inorganic compounds.

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  • 3. 

    What mashes and cuts food in your mouth?

    • Saliva mashes and cuts food in your mouth.

    • Your teeth mash and cut food in your mouth.

    • Your tongue mashes and cuts food in your mouth.

    • Your lips mash and cut food in your mouth.

    Correct Answer
    A. Your teeth mash and cut food in your mouth.
    Explanation
    Your teeth are responsible for mashing and cutting food in your mouth. They have a hard surface and sharp edges that allow them to break down food into smaller pieces, making it easier to chew and swallow. Additionally, the jaw movements while chewing help in further mashing and cutting the food. Saliva also plays a role in the process by moistening the food and aiding in the breakdown. The tongue helps in moving the food around the mouth, but it does not directly mash and cut the food. The lips are not involved in the mashing and cutting process.

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  • 4. 

    What organs produce enzymes that help in digestion?

    • The organs that produce enzymes that help in digestion are the pancreas and the liver.

    • The organs that produce enzymes that help in digestion are the heart and the kidneys.

    • The organs that produce enzymes that help in digestion are the eyes and the ears.

    • The organs that produce enzymes that help in digestion are the nose and tongue.

    Correct Answer
    A. The organs that produce enzymes that help in digestion are the pancreas and the liver.
    Explanation
    The pancreas and the liver are the correct answer because both organs play a crucial role in digestion. The pancreas produces enzymes such as amylase, lipase, and protease, which help break down carbohydrates, fats, and proteins respectively. These enzymes are released into the small intestine to aid in the digestion process. The liver, on the other hand, produces bile, which is stored in the gallbladder and released into the small intestine. Bile helps in the breakdown and absorption of fats. Therefore, the pancreas and the liver are essential organs in the production of enzymes that aid in digestion.

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  • 5. 

    Where does digestion begin?

    • In the stomach

    • In your mouth

    • In your large intestines

    • In your small intestines

    Correct Answer
    A. In your mouth
    Explanation
    Digestion begins in the mouth. This is where the process of breaking down food starts, as the teeth chew and grind the food into smaller pieces. Saliva is also present in the mouth, which contains enzymes that begin to break down carbohydrates. Therefore, the mouth plays a crucial role in the initial stages of digestion before the food moves down the esophagus and into the stomach.

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  • 6. 

    What is the liquid formed in the mouth that contains an enzyme?    

    • The liquid formed in the mouth that contains an enzyme is hydrochloric acid.

    • The liquid formed in the mouth that contains an enzyme is saliva.

    • The liquid formed in the mouth that contains an enzyme is saliva bile.

    • The liquid formed in the mouth that contains an enzyme is saliva blood.

    Correct Answer
    A. The liquid formed in the mouth that contains an enzyme is saliva.
    Explanation
    Saliva is the liquid formed in the mouth that contains an enzyme called amylase. Amylase helps in the breakdown of carbohydrates in the food we eat. Hydrochloric acid is actually found in the stomach, not in the mouth. Bile is produced by the liver and stored in the gallbladder, and it helps in the digestion of fats in the small intestine. Blood is not a liquid formed in the mouth and does not contain any enzymes for digestion. Therefore, the correct answer is saliva.

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  • 7. 

    What organ does food pass from the small intestine into?    

    • Food passes from the small intestine into the large intestine.

    • Food passes from the small intestine into the gallbladder.

    • Food passes from the small intestine into the liver.

    • Food passes from the small intestine into the esophagus.

    Correct Answer
    A. Food passes from the small intestine into the large intestine.
    Explanation
    After food is digested and absorbed in the small intestine, the remaining waste material passes into the large intestine. The large intestine is responsible for absorbing water and electrolytes from the waste material before it is eliminated from the body as feces. The gallbladder and liver are involved in the production and secretion of bile, which aids in the digestion of fats. The esophagus is the tube that connects the mouth to the stomach and does not play a role in the passage of food from the small intestine.

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  • 8. 

    What does saliva play in digestion?

    • Enzymes in saliva help to break down food.

    • It coats your stomach with protective lining.

    • It moves food through the intestine.

    • Saliva does not help with digestion.

    Correct Answer
    A. Enzymes in saliva help to break down food.
    Explanation
    Saliva plays a crucial role in digestion by containing enzymes that help break down food. These enzymes, such as amylase, begin the process of breaking down carbohydrates in the mouth before the food even reaches the stomach. This breakdown of food by the enzymes in saliva aids in the overall digestion process by making it easier for the stomach and intestines to further break down and absorb nutrients from the food. Therefore, the correct answer is that enzymes in saliva help to break down food.

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  • 9. 

    What type of acid breaks down food in your stomach?

    • The type of acid that breaks down food in your stomach is fruit acid.

    • The type of acid that breaks down food in your stomach is hypodermic acid.

    • The type of acid that breaks down food in your stomach is hydrochloric acid.

    Correct Answer
    A. The type of acid that breaks down food in your stomach is hydrochloric acid.
    Explanation
    Hydrochloric acid is the correct answer because it is the primary acid found in the stomach and is responsible for breaking down food. It helps to denature proteins, activate digestive enzymes, and kill bacteria that may be present in the food. Hydrochloric acid also creates an acidic environment in the stomach, which is necessary for the proper digestion of food. Fruit acid and hypodermic acid are incorrect options as they do not play a role in the digestion process in the stomach.

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  • 10. 

    Your food can spend up to _________________ in the small intestine.

    • 4 minutes

    • 4 months

    • 4 seconds

    • 6 hours

    Correct Answer
    A. 6 hours
    Explanation
    The correct answer is 6 hours. After food leaves the stomach, it enters the small intestine, where most of the digestion and absorption of nutrients takes place. The small intestine is approximately 2 feet long and has a highly folded inner surface called villi, which increases its surface area for better absorption. It takes several hours for food to pass through the small intestine, allowing enough time for the body to extract the necessary nutrients from the food before it moves on to the large intestine.

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  • 11. 

    Bile is made in the ______________________.

    • Large intestine.

    • Stomach.

    • Liver.

    • All of the above.

    Correct Answer
    A. Liver.
    Explanation
    Bile is a digestive fluid that helps in the breakdown and absorption of fats. It is produced in the liver and stored in the gallbladder. When food enters the small intestine, bile is released from the gallbladder into the small intestine to aid in the digestion of fats. Therefore, the correct answer is the liver, as it is the organ responsible for the production of bile.

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  • 12. 

    Where does most digestion in the small intestine take place?

    • Most digestion in the small intestine takes place in the Ileum.

    • Most digestion in the small intestine takes place in the pancreas.

    • Most digestion in the small intestine takes place in the liver.

    • Most digestion in the small intestine takes place in the heart.

    Correct Answer
    A. Most digestion in the small intestine takes place in the Ileum.
    Explanation
    The final segment of your small intestine, known as the ileum, holds the distinction of being the lengthiest. It serves as a primary site for the absorption of nutrients from ingested food before ultimately transferring them into the large intestine.

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  • 13. 

    What are chemicals that speed up the rate of chemical change?  

    • Chemicals that speed up the rate of chemical change are starches.

    • Chemicals that speed up the rate of chemical change are fats.

    • Chemicals that speed up the rate of chemical change are carbohydrates.

    • Chemicals that speed up the rate of chemical change are enzymes.

    Correct Answer
    A. Chemicals that speed up the rate of chemical change are enzymes.
    Explanation
    Enzymes are biological catalysts that speed up the rate of chemical reactions in living organisms. They are proteins that act as catalysts by lowering the activation energy required for a chemical reaction to occur. Enzymes are highly specific and can only catalyze specific reactions. They bind to specific substrates and convert them into products. Due to their ability to speed up chemical reactions, enzymes play a crucial role in various physiological processes in the body, such as digestion and metabolism.

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  • 14. 

    When they reach the stomach, mashed-up food particles mix with________________.

    • Guava juice.

    • Gastric juice.

    • Mucus

    • Bile.

    Correct Answer
    A. Gastric juice.
    Explanation
    When food reaches the stomach, it mixes with gastric juice. Gastric juice is a digestive fluid produced by the stomach lining, which contains enzymes and hydrochloric acid. These substances help break down the food into smaller particles and aid in the digestion process. Guava juice, mucus, and bile are not typically present in the stomach and do not play a direct role in the digestion of food.

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  • 15. 

    What is the main role of the large intestine?

    • The main role of the large intestine is to churn food around with enzymes.

    • The main role of the large intestine is to break down solid food.

    • The main role of the large intestine is to absorb water.

    • The main role of the large intestine is to mash and cut foods.

    Correct Answer
    A. 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 undigested food material that passes through it. It absorbs water and electrolytes, helping to maintain the body's fluid balance. This process is essential for the formation of solid waste and the prevention of dehydration. The large intestine does not primarily churn food with enzymes, break down solid food, or mash and cut foods.

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  • 16. 

    Which organs help with the absorption of nutrients?

    • The organs that help with the absorption of nutrients are the pancreas, liver, and gallbladder.

    • The organs that help with the absorption of nutrients are liver, heart, and spleen.

    • The organs that help with the absorption of nutrients are the gallbladder, kidneys, and appendix.

    • The organs that help with the absorption of nutrients are the kidneys, liver, and gallbladder.

    Correct Answer
    A. The organs that help with the absorption of nutrients are the pancreas, liver, and gallbladder.
    Explanation
    The pancreas, liver, and gallbladder are organs that aid in the absorption of nutrients. The pancreas produces enzymes that break down proteins, carbohydrates, and fats into smaller molecules that can be absorbed by the body. 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.

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  • 17. 

    What is the process of changing food into a form usable by the cells of the body?

    • The process of changing food into a form usable by the cells of the body is physical change .

    • The process of changing food into a form usable by the cells of the body is digestion.

    • The process of changing food into a form usable by the cells of the body is chewing.

    • The process of changing food into a form usable by the cells of the body is circulation.

    Correct Answer
    A. The process of changing food into a form usable by the cells of the body is digestion.
    Explanation
    The process of changing food into a form usable by the cells of the body is digestion. Digestion involves the breakdown of food into smaller molecules that can be absorbed and used by the cells. It starts in the mouth with chewing and continues in the stomach and small intestine, where enzymes break down food further. The nutrients are then absorbed into the bloodstream and transported to the cells for energy, growth, and repair. Digestion is a complex process that allows the body to extract the necessary nutrients from food for proper functioning.

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  • 18. 

    The liver's role is to ___________________.

    • Mash up food.

    • Turn water into food.

    • Help the stomach.

    • Remove the harmful substances from the blood.

    Correct Answer
    A. Remove the harmful substances from the blood.
    Explanation
    The liver plays a crucial role in the body's detoxification process by removing harmful substances from the blood. It filters out toxins, drugs, and other waste products, metabolizing them into less harmful forms that can be excreted from the body. This function helps to maintain the body's overall health and prevent damage to other organs and systems.

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  • 19. 

    _______ turns food into a new form: a form that cells can use.

    • Grinding

    • Physical change

    • Mixing

    • Chemical change

    Correct Answer
    A. Chemical change
    Explanation
    Chemical change is the correct answer because it refers to the process of transforming food into a new form that cells can utilize. Unlike physical changes such as grinding or mixing, which do not alter the chemical composition of the substance, a chemical change involves a rearrangement of atoms and the formation of new substances. In the context of food digestion, this process involves breaking down complex molecules into simpler ones through chemical reactions, allowing cells to absorb and utilize the nutrients.

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  • 20. 

    What is the baglike, muscular organ that mixes and chemically changes protein?  

    • The baglike, muscular organ that mixes and chemically changes protein is the liver .

    • The baglike, muscular organ that mixes and chemically changes protein is the small intestine.

    • The baglike, muscular organ that mixes and chemically changes protein is the large intestine

    • The baglike, muscular organ that mixes and chemically changes protein is the stomach.

    Correct Answer
    A. The baglike, muscular organ that mixes and chemically changes protein is the stomach.
    Explanation
    The stomach is a baglike, muscular organ that is responsible for mixing and chemically changing protein. It secretes gastric juices that contain enzymes and hydrochloric acid, which help break down proteins into smaller molecules for digestion. The muscular contractions of the stomach, known as peristalsis, further mix and churn the food, aiding in the chemical changes necessary for protein digestion.

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  • 21. 

    How long is the small intestine?

    • The small intestine is four to seven yards.

    • The small intestine is four to seven feet.

    • The small intestine is four to seven inches.

    • The small intestine is four to seven meters.

    Correct Answer
    A. The small intestine is four to seven meters.
    Explanation
    The small intestine is four to seven meters long. This is the correct answer because the small intestine is a long, coiled tube in the digestive system that connects the stomach to the large intestine. It is significantly longer than inches or feet, and meters is the most appropriate unit of measurement for the length of the small intestine.

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  • 22. 

    How long is an adult's small intestine?

    • An adult's small intestine is 22 feet.

    • An adult's small intestine is 30 inches.

    • An adult's small intestine is 30 miles.

    • An adult's small intestine is 17 feet.

    Correct Answer
    A. An adult's small intestine is 22 feet.
    Explanation
    The correct answer is that an adult's small intestine is 22 feet. The small intestine is a long, coiled tube that is part of the digestive system. It is responsible for absorbing nutrients from food and is divided into three sections: the duodenum, the jejunum, and the ileum. The length of the small intestine allows for maximum absorption of nutrients as food passes through the digestive system.

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  • 23. 

    Which of the following is NOT a primary function of the digestive system?

    • Breaking down food into smaller molecules 

    • Absorbing nutrients into the bloodstream 

    • Eliminating waste products 

    • Transporting oxygen to the body's cells  

    Correct Answer
    A. Transporting oxygen to the body's cells  
    Explanation
    The digestive system is responsible for the intake, breakdown, and absorption of food, as well as the elimination of waste products. It does not play a role in oxygen transport, which is the primary function of the respiratory system.

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  • 24. 

    The large intestine measures about _____________________.

    • One foot long.

    • 10 feet long.

    • 5 feet long.

    • 100 feet long.

    Correct Answer
    A. 5 feet long.
    Explanation
    The large intestine, also known as the colon, measures about 5 feet long. This is the correct answer because the large intestine is the last part of the digestive system, responsible for absorbing water and electrolytes from undigested food, and forming feces. It is shorter than the small intestine but still long enough to perform its important functions in the body.

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  • 25. 

    How long is the human digestive system?    

    • The human digestive system is about equal to your body height.

    • The human digestive system is about two times your body height

    • The human digestive system is about as long as your arm.

    • The human digestive system is about five times your body height.

    Correct Answer
    A. The human digestive system is about five times your body height.
    Explanation
    The human digestive system is a long, continuous tube that starts at the mouth and ends at the anus. It includes the mouth, esophagus, stomach, small intestine, large intestine, and rectum. The small intestine is the longest part of the digestive system, measuring about 20 feet in length. When combined with the length of the other parts of the digestive system, the total length can be up to five times your body height.

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  • 26. 

    Which of the following is NOT a function of the liver in the digestive process?

    • Production of bile 

    • Storage of glycogen 

    • Detoxification of blood 

    • Absorption of nutrients

    Correct Answer
    A. Absorption of nutrients
    Explanation
    While the liver plays a crucial role in digestion, it is not directly involved in the absorption of nutrients from food. That process primarily occurs in the small intestine. The liver's main digestive function is the production of bile, which helps in the breakdown and absorption of fats. It also plays a vital role in metabolism by storing glycogen, processing nutrients, and detoxifying the blood.

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Lindsey Block |PhD (Cellular & Molecular Biology) |
Lecturer | Molecular Biologist | Reproductive Scientist
Lindsey, Ph.D. in cellular and molecular biology from the University of Wisconsin-Madison, specializes in Zika's impact on conception and preterm birth biomarkers. She completed courese on Advanced Cell Biology at the University of Illinois at Urbana-Champaign and Advanced Virology at University College Cork. Lindsey's accolades include three first-author papers, three fellowships, and active participation in five conference presentations. Currently associated with the University of Pennsylvania through a T32 NIH Postdoctoral Fellowship, she continues to contribute significantly to her field, combining academic rigor with practical research to advance understanding in reproductive health and prenatal care. Currently, she is a full time lecturer at Northwestern University - The Feinberg School of Medicine.

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