Quiz on chapter 3

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What is the name of the projections on the inner surface of the small intestine?


Which of the following is a characteristic of the appendix?

it stores lymph cells

The purpose of bicarbonate in the digestive process is to

raise the pH of chyme

What is the lumen of the GI tract?

the inner space

What is the name given to partially digested food in the stomach?


What is the function of the gallbladder?

stores bile

Which of the following body organs does not secrete digestive enzymes?


In what organ does the digestion process begin?


What structure functions to prevent entrance of food into the trachea?


Which of the following describes the anatomy of the gastrointestinal tract?

flexible muscular tube

What is a bolus?

portion of food swallowed at one time

What is one function of the pyloric sphincter?

prevents the contents of the small intestine from backing up into the stomach

Which of the following is a feature of peristalsis?

it consists of wavelike muscular contractions resulting from alternate tightening and relaxing of circular muscles and longitudinal muscles

Into what region of the intestinal tract does the stomach empty?


After swallowing, in what order does food pass through the regions of the Gi tract?

stomach, duodenum, jejunum, ileum, colon

During the process of digestion, at what point does the stomach begin to release chyme?

when the chyme is liquefied

Among the GI tract organs, which has the strongest muscles?


Which of the following is a function of sphincter muscles?

control the passage of food through the GI tract

What types of enzymes are responsible for hydrolyzing the proteins in foods?


What is the function of mucus in the stomach?

protects stomach cells from gastric juices

The lower esophageal sphincter is known as the

cardiac sphincter

What is the function of hydrochloric acid in the stomach?

creates an optimum acidity

Why is there little or no digestion of starch (CHO) in the stomach?

salivary enzymes do not work in an acid environment

The usual pH of gastric juice is approximately


What is/are the primary target organ(s) for the action of cholecystokinin?

gallbladder and pancreas

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