Exam 40: Digestion and Absorption

Micelles contain mostly triglycerides.

Explain ways in which gastric motility is regulated.

Match each phase of gastric secretion with its corresponding statement or definition. -Phase that is initiated by the presence of food in the stomach

Which of the following best describes the enzymatic role in carbohydrate digestion?

"Dietary fiber" is a carbohydrate.

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

Match each structure with its function, description, or the enzyme it produces. -Location of lipase production that is ineffective because the ingested lipids are still too large

Gastric juice contains all of the following substances except:

Blood in the hepatic portal system is much more likely to reflect the amount of glucose and amino acid absorbed than is the blood in the inferior vena cava.

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

Bile is involved in both secretion and excretion.

Match each primary mechanism of the digestive system with its corresponding definition. -Movement by the muscular components of the digestive tube, including processes of mechanical digestion; examples include peristalsis and segmentation

Sucrose is an example of a disaccharide.

Explain the differences between peristalsis and segmentation.

Which of the following protein-digesting enzymes is made in the stomach?

Although the cotransport of sodium and glucose is a passive process, it would not be possible without the active transport of sodium out of the cell.

During deglutition, the tongue closes off the nasopharynx.

Intestinal amylase is attached to the brush borders of the villi and function in a process called contact digestion.

The process of emulsification is important because it facilitates a greater contact area for the digestion of fat.

The process of fat emulsification consists of: