A&P 2e - Ch 23: Digestive System (Review Questions)

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Which of these organs is not considered an accessory digestive structure?

mouth

Which of the following organs is supported by a layer of adventitia rather than serosa?

esophagus

Which of the following membranes covers the stomach?

visceral peritoneum

Which of these processes occurs in the mouth?

all of the above

Which of these processes occurs throughout most of the alimentary canal?

propulsion

Which of the following stimuli activates sensors in the walls of digestive organs?

all of the above

Which of these statements about reflexes in the GI tract is false?

Food that distends the stomach initiates long reflexes.

Which of these ingredients in saliva is responsible for activating salivary amylase?

chloride ions

Which of these statements about the pharynx is true?

The oropharynx is continuous superiorly with the nasopharynx.

Which structure is located where the esophagus penetrates the diaphragm?

esophageal hiatus

Which phase of deglutition involves contraction of the longitudinal muscle layer of the muscularis?

esophageal phase

Which of these cells secrete hormones?

enteroendocrine cells

Where does the majority of chemical digestion in the stomach occur?

fundus and body

During gastric emptying, chyme is released into the duodenum through the __.

pyloric sphincter

Parietal cells secrete __.

hydrochloric acid

In which part of the alimentary canal does most digestion occur?

proximal small intestine

Which of these is most associated with villi?

lacteals

What is the role of the small intestine’s MALT?

preventing bacteria from entering the bloodstream

Which part of the large intestine attaches to the appendix?

cecum

Which of these statements about bile is true?

Bile salts are recycled.

Pancreatic juice __.

buffers chyme.

Where does the chemical digestion of starch begin?

mouth

Which of these is involved in the chemical digestion of protein?

trypsin

Where are most fat-digesting enzymes produced?

pancreas

Which of these nutrients is absorbed mainly in the duodenum?

iron