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Chemical Digestion and Enzymes in the Digestive System

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Chemical Digestion and Enzymes in the Digestive System

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Questions and Answers

What is the main function of bile in chemical digestion?

Promote the breakdown of fats in the small intestine

Neutralize the acidic food and gastric juices (correct)

Increase the acidity in the duodenum

Enhance the enzyme action in the stomach

Where does absorption of most nutrients occur?

Esophagus

Small intestine (correct)

Large intestine

Stomach

What is the role of capillaries associated with villi in the small intestine?

Transport nutrients in the lymph

Carry glucose and amino acids in the blood (correct)

Increase surface area for absorption

Absorb fatty acids and glycerol

Why is the ileum particularly adapted for absorption?

It has a highly folded surface with millions of villi and microvilli Signup and view all the answers

What do lacteals do in the small intestine?

Transport fatty acids and glycerol in the lymph Signup and view all the answers

What is the role of chemical digestion?

To produce small soluble molecules that can be absorbed Signup and view all the answers

Where does the enzyme amylase act?

In the mouth and duodenum Signup and view all the answers

Which enzyme breaks down protein in the stomach?

Protease (Pepsin) Signup and view all the answers

What is the main function of hydrochloric acid in gastric juice?

Kills harmful microorganisms and provides optimal acidic pH for enzyme activity Signup and view all the answers

Where is lipase secreted from and where does it act?

Secreted by pancreas, acts in the duodenum Signup and view all the answers

Which enzyme plays a role in both physical and chemical digestion?

Bile Signup and view all the answers