Exam 40: Digestion and Absorption

Ingestion, digestion, secretion, and absorption are all necessary for the proper functioning of the digestive system.

To properly regulate the flow of food from the stomach to the small intestine, a balance is maintained between gastric inhibitory peptide that inhibits gastric motility and the enterogastric reflex that stimulates gastric motility.

The prefix "amyl" comes from the Latin word for "starch." How does that explain the name for an enzyme in carbohydrate digestion?

Match each phase of gastric secretion with its corresponding statement or definition. -Phase that is controlled by the entrance of acidic chyme into the duodenum

The final product of carbohydrate digestion is a:

Hydrochloric acid converts pepsinogen into pepsin.

Bile contains all of the following substances except:

What happens in the chemical process of hydrolysis?

Which of the following is not a digestive enzyme for lipids?

All digestive enzymes are classified as extracellular hydrolases.

Large amounts of cool, dilute, or isotonic fluids are best for replacing fluids quickly during exercise.

The lipase found in saliva is unable to digest much fat because the fat has not been emulsified.

Most enzymes are able to catalyze reactions in both directions, but that rarely occurs in digestive enzymes.

The end product of amylase digestion is:

Explain the process of fat digestion.

The only food that can be digested by gastric juice is protein.

Which step of deglutition is under voluntary control?

The intestinal hormone cholecystokinin:

Contact digestion makes absorption more efficient because the end products are then physically near the point of absorption, not floating around somewhere in the lumen.

Gastric secretions are inhibited when chyme containing fats, carbohydrates, and a high pH is present in the duodenum.