Question 1

What is found in the secretions of the salivary glands? Why is the lipase found in saliva ineffective as a digestive enzyme in the mouth?

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Question 2

Explain how the hepatic portal system and liver help maintain the blood homeostasis.

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Question 3

What substances are found in pancreatic juice? How are the inactive substances in pancreatic juice activated?

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Question 4

Donna has Crohn disease, which results in inflammation and ulceration of the small intestine. Her physician recommended surgery to help in the management of this autoimmune disease. Could her entire small intestine be removed? Why or why not?

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Question 5

Explain why trypsin and pepsin need to be made in an inactive form.

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Question 6

Allen was an alcoholic. He had a condition known as alcoholic hepatitis. This condition causes inflammation of the liver and results in reduced production and secretion of bile. What digestive complication does this produce?

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Question 7

Some drugs cannot be taken orally even if they are well absorbed by the small intestine because they are completely broken down by the liver. Explain why these drugs would never reach the general circulation.

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Question 8

Explain the difference between transcellular absorption and paracellular absorption. What can be absorbed by means of paracellular absorption?

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Question 9

Jeff was a successful country music star, but he worked too hard and was under great stress. His physician cautioned him that if he did not alter his lifestyle, he would be subject to hyperacidity. What could be the resulting condition of hyperacidity? Explain how the hyperacidity develops.

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Question 10

The optimal pH for the functioning of pepsin is 3; the optimal pH for the functioning of trypsin is 7. Explain why this difference would be expected.

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Quiz 40: Digestion and Absorption