Biology Lecture Quiz on Digestion and Enzymes
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Questions and Answers

Where does the hydrolysis of fats by lipase occur?

  • Esophagus
  • Small intestine (correct)
  • Large intestine
  • Stomach
  • What are fatty acids and monoglycerides recombined into after absorption by epithelial cells?

  • Peptides
  • Chylomicrons (correct)
  • Amylose
  • Nucleotides
  • Where are chylomicrons first transported into after exiting the intestine?

  • Arteries
  • Blood capillaries
  • Lacteals (correct)
  • Veins
  • Which cell organelle is involved in forming water-soluble globules called chylomicrons?

    <p>Golgi apparatus</p> Signup and view all the answers

    What is the primary site for the detoxification of many organic molecules, including drugs?

    <p>Liver</p> Signup and view all the answers

    Which vessel is at the core of each villus and transports chylomicrons from epithelial cells?

    <p>Lacteal</p> Signup and view all the answers

    Which type of nutrient absorption occurs in the lymph or bloodstream as monomers?

    <p>Monomers</p> Signup and view all the answers

    Which enzyme has high activity in an acidic environment?

    <p>Pepsin</p> Signup and view all the answers

    How does the absorption process of fats differ from that of carbohydrates?

    <p>Most absorbed fat first enters the lymphatic system, whereas carbohydrates directly enter the blood.</p> Signup and view all the answers

    Which nutritional monomer can be transported in the blood after a typical meal?

    <p>Fatty acid</p> Signup and view all the answers

    In which part of the vasculature does the glucose concentration vary the most for a nondiabetic person?

    <p>Hepatic portal vessel</p> Signup and view all the answers

    Why do the folds, villi, and microvilli of the small intestine have a large surface area?

    <p>To increase the absorption of nutrients</p> Signup and view all the answers

    How does fructose move from the lumen of the small intestine into the epithelial cells?

    <p>Facilitated diffusion down its concentration gradient</p> Signup and view all the answers

    Which nutrients are pumped against concentration gradients by the epithelial cells of the villus for absorption?

    <p>Amino acids, small peptides, vitamins, and glucose molecules</p> Signup and view all the answers

    Where does fructose go after it is absorbed into the epithelial cells of the villus?

    <p>Exits the basal surface and is absorbed into capillaries</p> Signup and view all the answers

    What role does the hepatic portal vein play in nutrient absorption?

    <p>Carries nutrient-rich blood away from the villi to the liver</p> Signup and view all the answers

    Which process allows much more absorption of nutrients than passive diffusion alone in the small intestine?

    <p>Active transport by epithelial cells</p> Signup and view all the answers

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