Gastrointestinal System

    Gastrointestinal System
    What are the end products resulting from the digestion of carbohydrates?
    Digestion results in carbohydrates (which are polysaccharides) being converted to monosaccharides (which are small molecules).
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    Gastrointestinal System
    Which of the following substances is NOT produced by the cells of the gastric glands?
    Mucus cells are in the epithelium, not in the gastric glands, and produce mucus.
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    Gastrointestinal System
    What molecules are the products of protein hydrolysis?
    Amino acids and small peptides (consisting of two or three amino acids) are hydrolysis products of proteins.
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    Gastrointestinal System
    What is true about the “muscularis externa”?
    Muscularis externa is a layer (a tunic) of the gut wall.
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    Gastrointestinal System
    In the digestion of food molecules, the process known as “hydrolysis” involves an enzyme and what else?
    Hydro- refers to water; -lysis refers to splitting of a molecule.
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    Gastrointestinal System
    What does the hormone gastrin do?
    Gastrin stimulates the G cells of the gastric glands in the stomach wall to secrete hydrochloric acid.
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    Gastrointestinal System
    The functions of the stomach are:
    Choice A is not wrong, but D is better as it includes glucose, which, being a small molecule, can be absorbed through the stomach wall.
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    Gastrointestinal System
    Which of the following statements is WRONG? The end products of:
    The products of fat digestion are transported by the lymphatic system but do not pass through the liver.
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    Gastrointestinal System
    What is the process that splits carbohydrates in the gut into smaller molecules called?
    Glycogenolysis also splits a carbohydrate (glycogen) into smaller molecules (glucose), but this happens in the liver.
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    Gastrointestinal System
    Which of the following is an active enzyme?
    The prefix “pro-” and suffix “-ogen” refer to inactive enzymes. Telophase is a stage of cell division (not an enzyme).
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