Protein Absorption Quiz
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Questions and Answers

Which cells in the stomach secrete pepsinogen?

  • Enteropeptidase
  • Brush border cells
  • Chief cells (correct)
  • Parietal cells
  • What activates pepsinogen to become pepsin?

  • HCL (correct)
  • Enteropeptidase
  • Amylase
  • Lipase
  • Which enzyme is most specific in cleaving peptide bonds before arginine and lysine?

  • Chymotrypsin
  • Lipase
  • Trypsin (correct)
  • Amylase
  • Which enzyme cleaves amino acids with small side chains?

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

    Which enzyme is responsible for cleaving hydrophobic C-terminal amino acids?

    <p>Carboxypeptidase A</p> Signup and view all the answers

    Where is enteropeptidase secreted from?

    <p>Brush border cells</p> Signup and view all the answers

    Which enzyme is responsible for cleaving hydrophobic amino acids?

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

    Which enzyme is responsible for cleaving amino acids from the amino terminal end?

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

    What is the function of pancreatic lipase?

    <p>Cleaves lipids</p> Signup and view all the answers

    What is the function of pancreatic amylase?

    <p>Cleaves carbohydrates</p> Signup and view all the answers

    Which side of the intestinal epithelial cells do amino acids and small peptides get absorbed through?

    <p>Apical side</p> Signup and view all the answers

    Which of the following maintains the sodium gradient required for the co-transport of amino acids in the intestinal epithelial cells?

    <p>Na+ K+ ATPase</p> Signup and view all the answers

    How many specific Na+ dependent transporters are involved in the absorption of amino acids in the intestinal epithelial cells?

    <p>6 or more</p> Signup and view all the answers

    Which of the following amino acids are transported out of the intestinal epithelial cells on the serosal side?

    <p>Neutral amino acids</p> Signup and view all the answers

    During starvation, what happens to the absorption of amino acids by intestinal cells?

    <p>It becomes reversible</p> Signup and view all the answers

    Which cells can concentrate amino acids from the blood?

    <p>Intestinal cells</p> Signup and view all the answers

    Which of the following proteins have a high turnover rate?

    <p>All of the above</p> Signup and view all the answers

    What happens to excess protein in the diet?

    <p>It is converted to triglycerides</p> Signup and view all the answers

    What is the role of mTOR in regulating autophagy?

    <p>Inhibits autophagy</p> Signup and view all the answers

    What is the function of Rheb and TSC1/TSC2 in regulating autophagy?

    <p>Activate autophagy</p> Signup and view all the answers

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