Exam 40: Digestion and Absorption

Because acid would be harmful to enzymes, the salivary glands produce bicarbonate ions to lower the pH of saliva.

After leaving the stomach, chyme normally takes about 5 hours to pass all the way through the small intestine.

An enzyme that is a hydrolase breaks water down into hydrogen and oxygen.

The sodium cotransport, which carries both sodium ions and glucose molecules, is an active transport mechanism.

Match each of the digestive juices and enzymes with its corresponding description. -Major enzyme in stomach associated with protein breakdown

The intestinal hormone cholecystokinin:

Chylomicrons are usually not found in the lumen of the small intestine.

Match each digestive hormone with its action. -Stimulates secretion of gastric juice rich in pepsin and hydrochloric acid

Contact digestion occurs in which location in the digestive system?

Why can it be said that absorption is the reason for digestion?

Match each digestive hormone with its action. -Inhibits gastric secretion; stimulates secretion of pancreatic juice low in enzymes and high in alkalinity; stimulates ejection of bile by the gallbladder

Which of the following structures is not used to block an opening during swallowing?

Which of the following is not a barrier to the absorption of glucose?

Enterokinase converts trypsin into trypsinogen.

After the absorption of a large meal, high levels of chylomicrons would be found in the:

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

The formation of feces is the primary function of the rectum.

To propel food from the pharynx into the esophagus, three openings must be blocked.

Match each phase of gastric secretion with its corresponding statement or definition. -Phase that responds to taste, smell, thoughts of food, and sensations of chewing and swallowing

Chylomicrons are formed to facilitate the transport of: