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CXC - Caribbean Examinations Council Human and Social Biology: The Human Digestive System Flashcards

6 cards from real CXC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 CXC - Caribbean Examinations Council Human and Social Biology: The Human Digestive System flashcards as text

  1. What is the role of amylase in digestion?

    Answer: It breaks down starch into maltose

    Amylase is a carbohydrase enzyme that catalyzes the breakdown of starch into the disaccharide maltose.

  2. Where does chemical digestion of food BEGIN in the human digestive system?

    Answer: Mouth

    Chemical digestion begins in the mouth, where salivary amylase starts breaking down starch while teeth perform mechanical digestion.

  3. Which organ produces bile and what is bile's function?

    Answer: Liver; it emulsifies fats

    The liver produces bile, which emulsifies large fat droplets into smaller ones, increasing the surface area for lipase to act on.

  4. What is the function of villi in the small intestine?

    Answer: To increase the surface area for absorption of digested nutrients

    Villi are finger-like projections lining the small intestine that greatly increase the surface area available for absorbing digested nutrients into the bloodstream.

  5. Which enzyme found in the stomach breaks down proteins?

    Answer: Pepsin

    Pepsin is a protease enzyme secreted in the stomach that breaks peptide bonds in proteins, producing smaller polypeptide chains.

  6. What is the main function of the large intestine?

    Answer: Absorption of water and formation of feces

    The large intestine primarily absorbs water from undigested food residue and compacts the remaining material into feces for elimination.