Digestive System, Organs And Enzymes Quiz

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| By Angelyura
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Angelyura
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Digestive System, Organs And Enzymes Quiz - Quiz

The digestive system is the system that is charged with breaking down the food we ingest and disposing of unwanted materials. This process is made possible through the help of specific organs that form the system. There are three main types of digestive enzymes, include Proteases, Lipases, and Amylases. See how much you understand about the digestive system organs and enzymes by taking the test below.


Questions and Answers
  • 1. 

    What is the purpose of eating food?

    • A.

      Ingestion

    • B.

      Digestion

    • C.

      Absorbtion

    • D.

      Egestion

    • E.

      All of the above

    Correct Answer
    E. All of the above
    Explanation
    Ingestion is consuming, digestion is breaking down the food, absorption is taking the nutrients into your body and egestion is expelling excrement out of the body.

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  • 2. 

    How does food move through the oesophagus?

    • A.

      Cilia (small hairs) move it

    • B.

      Gravity

    • C.

      Peristalsis

    • D.

      Chest muscles contracting around the oesophagus

    • E.

      All of the above

    Correct Answer
    C. Peristalsis
    Explanation
    Peristalsis is a unidirectional muscular contraction of the oesophagus that pushes the food through towards the stomach.

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  • 3. 

    Where does digestion start?

    • A.

      Stomach

    • B.

      Mouth

    • C.

      Small intestines

    • D.

      Large intestines

    • E.

      Oesophagus

    Correct Answer
    B. Mouth
    Explanation
    Digestion starts in the mouth. This is where the process of breaking down food begins, as the teeth chew the food into smaller pieces, and saliva is released to moisten and soften the food. The saliva also contains enzymes that start the chemical breakdown of carbohydrates. Once the food is sufficiently broken down in the mouth, it is then swallowed and travels down the esophagus to the stomach for further digestion.

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  • 4. 

    What is mechanical digestion?

    • A.

      The physical breakdown of food

    • B.

      Enzymes breaking down food

    • C.

      A and B

    Correct Answer
    A. The physical breakdown of food
    Explanation
    Mechanical digestion refers to the physical breakdown of food. This process involves the physical actions of chewing, grinding, and churning that occur in the mouth, stomach, and intestines. It helps to increase the surface area of the food, making it easier for enzymes to break down the food further during chemical digestion. Therefore, the correct answer is "The physical breakdown of food."

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  • 5. 

    What is chemical digestion?

    • A.

      The physical breakdown of food

    • B.

      Enzymes breaking down food

    • C.

      A and B

    Correct Answer
    B. Enzymes breaking down food
    Explanation
    Chemical digestion refers to the process in which enzymes break down food. Enzymes are biological molecules that act as catalysts, speeding up chemical reactions in the body. In the case of digestion, enzymes help to break down complex molecules in food into smaller, simpler molecules that can be absorbed and utilized by the body. This process occurs in various parts of the digestive system, such as the mouth, stomach, and small intestine. The physical breakdown of food, on the other hand, is referred to as mechanical digestion and involves actions like chewing and churning. Therefore, the correct answer is enzymes breaking down food.

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  • 6. 

    Where does chemical digestion start?

    • A.

      Large intestines

    • B.

      Small intestines

    • C.

      Stomach

    • D.

      Mouth

    • E.

      Liver

    Correct Answer
    D. Mouth
    Explanation
    Chemical digestion starts in the mouth. This is where the process of breaking down food into smaller molecules begins. The salivary glands in the mouth produce saliva, which contains enzymes that help break down carbohydrates. Additionally, chewing food in the mouth helps to physically break it down into smaller pieces, increasing the surface area for the enzymes to work on. Therefore, the mouth is the initial site of chemical digestion in the digestive system.

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  • 7. 

    What is an enzyme?

    • A.

      A catalyst that speeds up the breakdown of digestion

    • B.

      A chemical that breaks down food

    • C.

      A virus

    • D.

      An organ in the human body

    • E.

      All of the above

    Correct Answer
    A. A catalyst that speeds up the breakdown of digestion
    Explanation
    Enzymes are catalysts that speed up chemical reactions in the body, including the breakdown of food during digestion. They are not chemicals themselves, but rather proteins that facilitate the conversion of food molecules into smaller, more easily absorbable forms. Enzymes are not viruses or organs in the human body. Therefore, the correct answer is "A catalyst that speeds up the breakdown of digestion."

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  • 8. 

    What does the salivary gland secrete?

    • A.

      Saliva

    • B.

      Amylase

    • C.

      Pepsin

    • D.

      A and B

    • E.

      A, B and C

    Correct Answer
    D. A and B
    Explanation
    The salivary gland secretes saliva, which contains various enzymes including amylase. Amylase helps in the breakdown of starches into simpler sugars. Therefore, the correct answer is A and B, as both saliva and amylase are secreted by the salivary gland.

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  • 9. 

    What does amylase break down?

    • A.

      Protein

    • B.

      Fructose

    • C.

      Fats

    • D.

      Complex carbohydrates

    • E.

      Fibre

    Correct Answer
    D. Complex carbohydrates
    Explanation
    Amylase is an enzyme that is responsible for breaking down complex carbohydrates into simpler sugars. Therefore, the correct answer is complex carbohydrates. Amylase is produced in the salivary glands and pancreas and plays a crucial role in the digestion of carbohydrates, allowing the body to absorb and utilize them for energy.

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  • 10. 

    The stomach does what?

    • A.

      Churns the food into chyme

    • B.

      Regulates the amount of food that goes in and out of the stomach

    • C.

      Releases pepsin and protease

    • D.

      The stomach walls release mucus, water and hydrochloric acid

    • E.

      All of the above

    Correct Answer
    E. All of the above
    Explanation
    The stomach performs multiple functions in the digestive process. It churns the food into chyme, which is a semi-fluid mixture. It also regulates the amount of food that goes in and out of the stomach, allowing for controlled digestion. The stomach releases pepsin and protease, which are enzymes that help break down proteins. Additionally, the stomach walls release mucus, water, and hydrochloric acid, which help to create an acidic environment necessary for digestion. Therefore, all of the above options accurately describe the functions of the stomach.

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  • 11. 

    Hydrochloric acid does what?

    • A.

      Stops amylase from working

    • B.

      Creates the optimum environment for pepsin and protease

    • C.

      Breaks down fats

    • D.

      Neutralises the pH levels

    • E.

      All of the above

    Correct Answer
    B. Creates the optimum environment for pepsin and protease
    Explanation
    Hydrochloric acid creates the optimum environment for pepsin and protease. This is because pepsin and protease are enzymes that are involved in the digestion of proteins. They require an acidic environment to function properly, and hydrochloric acid helps to create this acidic environment in the stomach. By creating the optimum environment, hydrochloric acid ensures that pepsin and protease can effectively break down proteins into smaller peptides and amino acids for absorption in the digestive system.

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  • 12. 

    The purpose of the muscus is what?

    • A.

      To protect the stomach lining

    • B.

      Keep the food moist

    • C.

      Allows nutrients to be absorbed

    • D.

      Carries the enzymes

    • E.

      All of the above

    Correct Answer
    A. To protect the stomach lining
    Explanation
    The purpose of the mucus is to protect the stomach lining. Mucus forms a protective layer on the stomach wall, preventing the acidic gastric juices from damaging the delicate tissues. It acts as a barrier between the stomach lining and the acidic environment, reducing the risk of ulcers and other digestive issues.

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  • 13. 

    What do pepsin and protease do?

    • A.

      Breaks down long-chain peptides into short-chain peptides

    • B.

      Breaks down fats into fatty acids

    • C.

      Breaks down sucrose into glucose

    • D.

      Breaks down long amino acids into smaller amino acid chains

    • E.

      All of the above

    Correct Answer
    D. Breaks down long amino acids into smaller amino acid chains
    Explanation
    Pepsin and protease are enzymes that are involved in the process of protein digestion. They break down long amino acid chains, which are the building blocks of proteins, into smaller chains of amino acids. This allows for easier absorption and utilization of these amino acids by the body. The other options mentioned, such as breaking down fats into fatty acids or breaking down sucrose into glucose, are not the specific functions of pepsin and protease. Therefore, the correct answer is that pepsin and protease break down long amino acids into smaller amino acid chains.

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  • 14. 

    Muscus is made of what?

    • A.

      Glucose

    • B.

      Amino acids

    • C.

      Protein

    • D.

      Fatty acids

    • E.

      All of the above

    Correct Answer
    C. Protein
    Explanation
    Mucus is made of protein. Mucus is a slimy substance that is produced by various tissues in the body, including the respiratory, digestive, and reproductive systems. It serves as a protective barrier and lubricant. Proteins are large molecules made up of amino acids, and they play a crucial role in the structure and function of cells and tissues. Therefore, it is logical to conclude that mucus, being a complex substance, is primarily composed of proteins.

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  • 15. 

    From the stomach where does the food move next?

    • A.

      Ileum

    • B.

      Duodenum

    • C.

      Jejunum

    • D.

      Gall bladder

    • E.

      Liver

    Correct Answer
    B. Duodenum
    Explanation
    After being digested in the stomach, the food moves into the duodenum. The duodenum is the first part of the small intestine and plays a crucial role in the digestion process. It receives digestive enzymes from the pancreas and bile from the liver and gallbladder, which help further break down the food. The duodenum also absorbs nutrients from the food before it continues to move through the rest of the small intestine.

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  • 16. 

    How does the food move from the stomach to the small intestines

    • A.

      Sphincter muscles

    • B.

      Peristalsis

    • C.

      Gravity

    • D.

      Smooth muscles located around the stomach and small intestines

    • E.

      All of the above

    Correct Answer
    B. Peristalsis
    Explanation
    Peristalsis is the correct answer because it is the process by which food moves through the digestive system. It involves rhythmic contractions of the smooth muscles in the walls of the stomach and intestines. These contractions help to propel the food forward, allowing it to move from the stomach to the small intestines. Sphincter muscles also play a role in regulating the flow of food, but peristalsis is the main mechanism responsible for moving the food along the digestive tract. Gravity does not play a significant role in this process.

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  • 17. 

    The small intestines consists of what?

    • A.

      The ileum

    • B.

      The duodenum

    • C.

      The jejunum

    • D.

      The ileum, duodenum and jejunum

    Correct Answer
    D. The ileum, duodenum and jejunum
    Explanation
    The small intestines consist of three main parts: the ileum, duodenum, and jejunum. Each of these sections plays a crucial role in the digestion and absorption of nutrients. The duodenum is the first part of the small intestines and receives partially digested food from the stomach. The jejunum is the middle part and is responsible for the majority of nutrient absorption. The ileum is the final section and absorbs any remaining nutrients, as well as bile salts and vitamin B12. Therefore, the correct answer is the ileum, duodenum, and jejunum.

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  • Current Version
  • Mar 21, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Mar 24, 2009
    Quiz Created by
    Angelyura
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