Exam 40: Digestion and Absorption

Explain the mechanism of absorption for water-soluble nutrients.

Hydrochloric acid converts pepsinogen into pepsin.

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

Bilirubin is found in bile and assists in micelle formation, which assists in the digestion of fats.

Chylomicrons contain almost all monoglycerides.

Glycogen and sucrose are examples of polysaccharides.

The enzymes amylase and lipase are found in saliva and are equally effective in their digestion of substrates.

Gastric inhibitory peptide and the enterogastric reflex have opposite effects on gastric peristalsis.

Bile catalyzes the breakdown of fats.

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

Explain the mechanism of absorption for lipids.

Match each structure with its function, description, or the enzyme it produces. -Organ in which bile is concentrated and stored

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.

Which of the following is a disaccharide?

In the pancreas, base is secreted into the GI lumen and acid is secreted into the blood. This is the reverse of what happens in the stomach.

The names of enzymes are easy to identify because they all end in "ase."

The last stage of deglutition is the pharyngeal stage.

Lipase can be called a hydrolase.

Most enzymes catalyze a chemical reaction in both directions. Explain what this means.

The final product of carbohydrate digestion is a: