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Small Intestine and Digestion

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Questions and Answers

What is the location where the final levels of digestion occur?

Pancreas

Brush border (correct)

Lumen of the stomach

Small intestine

What type of cells secrete hormones such as secretin, cholecystokinin, and gastric inhibitory peptide?

Goblet cells

Endocrine cells (correct)

Paneth cells

Absorptive cells

What is the function of the brush border enzymes aminopeptidase and dipeptidase?

Break down large starch molecules into medium-sized molecules

Break down polypeptides into individual amino acids (correct)

Emulsify lipids

Break down proteins into smaller polypeptides

What is the function of pancreatic juice in lipid digestion?

Break down lipids into fatty acids and glycerol Signup and view all the answers

What is the function of the enzyme ribonuclease?

Digest RNA Signup and view all the answers

What is the function of the mucus secreted by goblet cells?

Lubricate and maintain the integrity of the brush border Signup and view all the answers

What is the location where most of the digestion of proteins occurs?

Pancreas Signup and view all the answers

What is the function of the enzyme lingual lipase?

Digest lipids in the stomach Signup and view all the answers

What is the primary function of the microvilli in the small intestine?

To increase the surface area for digestion and absorption Signup and view all the answers

What is the role of the brush border in the small intestine?

To trap a thin layer of fluid for final digestion Signup and view all the answers

Which type of cells are responsible for secreting lysozymes in the small intestine?

Paneth cells Signup and view all the answers

What is the primary function of the enzyme amylase in digestion?

To break down starch molecules into medium-sized molecules Signup and view all the answers

What is the role of the pancreas in lipid digestion?

To secrete lipases for digestion Signup and view all the answers

What is the primary function of the enzyme carboxypeptidase in digestion?

To break down polypeptides into individual amino acids Signup and view all the answers

What is the role of the enzyme deoxyribonuclease in digestion?

To break down DNA into nucleotides Signup and view all the answers

What is the primary function of the absorptive cells in the small intestine?

To absorb nutrients into the bloodstream Signup and view all the answers