Question 1

Which of the following best describes the main function of the small intestine?

Accepted Answer

Site of most enzymatic digestion and absorption of nutrients

Question 2

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

Accepted Answer

Emulsification and absorption of fats in the small intestine

Question 3

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

Accepted Answer

Muscularis externa

Question 4

Which of the following statements about smooth muscle contraction in the digestive tract is correct?

Accepted Answer

Smooth muscle contraction is regulated by the myenteric nerve plexus and can be sustained for long periods.

Question 5

A patient with a damaged myenteric nerve plexus would most likely experience which of the following symptoms?

Accepted Answer

Reduced peristalsis and segmentation in the intestines

Question 6

Which of the following best explains why the stomach has an additional oblique muscle layer compared to other parts of the alimentary canal?

Accepted Answer

To enhance the mechanical breakdown and churning of food

Question 7

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

Accepted Answer

Secretion of bile for fat emulsification

Question 8

A patient presents with jaundice and impaired fat digestion. Which organ is most likely malfunctioning?

Accepted Answer

Gallbladder

Question 9

Which of the following structures is classified as a secondarily retroperitoneal organ?

Accepted Answer

Ascending colon

Question 10

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

Accepted Answer

Rhythmic local contractions that mix intestinal contents

Question 11

A patient has a peptic ulcer in the duodenum. Which of the following is the most likely cause?

Accepted Answer

Helicobacter pylori infection

Question 12

Which of the following is a major function of the large intestine?

Accepted Answer

Absorption of water and electrolytes

Question 13

Which of the following best describes the role of the pancreas in digestion?

Accepted Answer

Produces enzymes that digest all major food types in the small intestine

Question 14

Which of the following is true regarding the histology of the intestinal wall?

Accepted Answer

The submucosa contains blood and lymphatic vessels

Question 15

A patient with a tumor compressing the superior mesenteric artery would most likely have impaired blood supply to which organ?

Accepted Answer

Jejunum

Question 16

Which of the following best explains why elderly individuals are more prone to constipation?

Accepted Answer

Dehydration of fecal mass and decreased efficiency of absorption

Question 17

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

Accepted Answer

Mucosa, submucosa, muscularis externa, serosa

Question 18

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

Accepted Answer

Increase surface area for absorption

Question 19

Which of the following is a function of the mesenteries in the abdominal cavity?

Accepted Answer

Hold digestive organs in place and store fat

Question 20

A patient with a deficiency in parietal cells of the stomach would most likely have difficulty with which process?

Accepted Answer

Secretion of hydrochloric acid for protein digestion

Chapter 23: The Digestive System – Study Notes

Study Guide - Practice Questions