Question 1

Which of the following best describes the primary function of the small intestine in the digestive system?

Accepted Answer

Absorption of digested nutrients into the blood and lymph

Question 2

A patient presents with a blockage in the common bile duct. Which digestive process will be most directly affected?

Accepted Answer

Emulsification and digestion of fats

Question 3

Which layer of the alimentary canal wall is responsible for peristalsis and segmentation?

Accepted Answer

Muscularis externa

Question 4

A patient with cystic fibrosis often experiences malabsorption of fats. This is primarily due to:

Accepted Answer

Blockage of pancreatic ducts by mucus

Question 5

Which of the following is a correct sequence of the layers of the alimentary canal from innermost to outermost?

Accepted Answer

Mucosa, submucosa, muscularis externa, serosa

Question 6

Which cell type in the stomach secretes hydrochloric acid?

Accepted Answer

Parietal cells

Question 7

A patient with a peptic ulcer in the duodenum is most likely to have an infection with which organism?

Accepted Answer

Helicobacter pylori

Question 8

Which of the following best explains why the large intestine contains numerous goblet cells?

Accepted Answer

To lubricate fecal material for easier passage

Question 9

Which anatomical feature increases the surface area for absorption in the small intestine?

Accepted Answer

Villi and microvilli

Question 10

A patient has a tumor compressing the myenteric nerve plexus. Which digestive process is most likely to be impaired?

Accepted Answer

Coordination of muscular contractions for peristalsis

Question 11

Which of the following is a function of the liver related to digestion?

Accepted Answer

Production of bile

Question 12

Which of the following best describes segmentation in the small intestine?

Accepted Answer

Mixes food with digestive juices by rhythmic local contractions

Question 13

A patient with a damaged cardiac sphincter is at increased risk for which condition?

Accepted Answer

Gastroesophageal reflux disease (GERD)

Question 14

Which of the following is true regarding the histology of the esophagus?

Accepted Answer

It is lined with nonkeratinized stratified squamous epithelium

Question 15

Which of the following best explains the role of bile in digestion?

Accepted Answer

Bile emulsifies fats, increasing their surface area for enzyme action

Question 16

Which of the following is a correct description of the portal triad in the liver?

Accepted Answer

It consists of a bile duct, a branch of the hepatic portal vein, and a branch of the hepatic artery

Question 17

A patient with a nonmechanical intestinal obstruction is most likely to have which underlying cause?

Accepted Answer

Halt in peristalsis due to trauma or surgery

Question 18

Which of the following best describes the function of the enterocytes in the small intestine?

Accepted Answer

Uptake digested nutrients for absorption

Question 19

Which of the following is a distinguishing feature of the large intestine compared to the small intestine?

Accepted Answer

Absence of villi and presence of numerous goblet cells

Question 20

Which hormone is released from enteroendocrine cells in response to fatty chyme and stimulates bile release from the gallbladder?

Accepted Answer

Cholecystokinin (CCK)

The Digestive System: Structure, Function, and Clinical Correlations

Study Guide - Practice Questions