Exam 40: Digestion and Absorption

Secretions of the digestive glands are mostly water.

The specificity of enzyme function can be explained by the "key-in-a-lock" mode of action.

Match each digestive hormone with its action. -Stimulates ejection of bile from the gallbladder and secretion of pancreatic juice high in enzymes; opposes the action of gastrin, reducing the pH of gastric juice

Segmentation can be described simply as a mixing movement.

The three stages of deglutition are the oral stage, the laryngeal stage, and the esophageal stage.

Bicarbonates are useful in the GI tract for neutralizing hydrochloric acid.

Which of the following does not cause a decrease in gastric peristalsis?

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

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.

The drug omeprazole (Prilosec) works by stimulating the H-K pumps, thereby reducing the amount of acid in the stomach.

The bolus of food is formed during the pharyngeal stage of deglutition.

The main proteases found in gastric juice are pepsin and trypsin.

The parietal cells of the stomach do not produce which of the following?

Which blood vessel carries absorbed food from the GI tract to the liver?

What happens in the chemical process of hydrolysis?

The hormone that stimulates the release of bicarbonate substance from the pancreas is:

Which of the following works with gastric inhibitory peptide to inhibit gastric peristalsis?

Chewing and swallowing are both considered mechanical digestion.

Match each of the digestive juices and enzymes with its corresponding description. -Substance that emulsifies fat

The disaccharide maltose is made up of which two saccharide units?