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 (D)</p> Signup and view all the answers

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

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

Where is enteropeptidase secreted from?

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

Which enzyme is responsible for cleaving hydrophobic amino acids?

<p>Chymotrypsin (B)</p> Signup and view all the answers

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

<p>Aminopeptidase (D)</p> Signup and view all the answers

What is the function of pancreatic lipase?

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

What is the function of pancreatic amylase?

<p>Cleaves carbohydrates (C)</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 (B)</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 (C)</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 (B)</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 (C)</p> Signup and view all the answers

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

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

Which cells can concentrate amino acids from the blood?

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

Which of the following proteins have a high turnover rate?

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

What happens to excess protein in the diet?

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

What is the role of mTOR in regulating autophagy?

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

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

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

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