Chapter 29 Digestive System

The raw material for building cellular membranes is provided by which type of nutrient?

• carbohydrates

• fats

• proteins

• viatmins

• minerals

The raw material for making enzymes is provided by which type of nutrient?

• carbohydrates

• fats

• proteins

• vitamins

• minerals

The chemical bonds within larger molecules of food are broken during the process of

• ingestion.

• mechanical digestion.

• chemical digestion.

• absorption.

• elimination.

Chemical digestion takes place in the mouth with the aid of

• epithelial cells.

• a bolus.

• the process of peristalsis.

• saliva.

• villi.

Food is prevented from entering the windpipe by

• the gallbladder.

• the process of peristalsis.

• saliva.

• villi.

• the epiglottis.

Food moves from your mouth toward your stomach due to

• the effects of gravity.

• the process of peristalsis.

• the fact that your mouth is higher than your stomach.

• a vacuum.

• A and C

The backward flow of acidic chyme can cause ___ when the passageway between the esophagus and the stomach opens at the wrong time.

• bad breath

• nausea

• diarrhea

• heartburn

• none of the above

Digestion is completed and absorption of most nutrients takes place in the

• small intestine.

• liver.

• pancreas.

• gallbladder.

• stomach.

Absorption of nutrients in the small intestine is facilitated by which of the following?

• villi

• epithelial cells

• circular folds

• microvilli

• all of the above

Bile is produced in the ___ and stored in the ___.

• small intestine; liver

• stomach; small intestine

• pancreas; liver

• liver; gallbladder

• liver; pancreas