Question 1

Which layer of the digestive tract is primarily responsible for peristalsis and segmentation movements?

Accepted Answer

The muscularis externa

Question 2

A patient presents with difficulty swallowing (dysphagia). Which anatomical structure is most likely affected?

Accepted Answer

The esophagus

Question 3

Which of the following correctly describes the function of chief cells in the stomach?

Accepted Answer

Secrete pepsinogen

Question 4

During digestion, which organ is primarily responsible for the absorption of nutrients into the bloodstream?

Accepted Answer

Small intestine

Question 5

Which of the following is a function of the liver in the digestive system?

Accepted Answer

Secretion of bile

Question 6

A patient has a blockage at the sphincter of ampulla. Which process will be most directly affected?

Accepted Answer

Release of bile and pancreatic juice into the duodenum

Question 7

Which of the following best describes the role of the enteric nervous system in the digestive tract?

Accepted Answer

Regulates local reflexes and secretions

Question 8

Which region of the small intestine receives secretions from both the liver and pancreas?

Accepted Answer

Duodenum

Question 9

Which of the following structures is NOT considered an accessory digestive organ?

Accepted Answer

Stomach

Question 10

Which of the following is the correct sequence of layers from the lumen outward in the digestive tract?

Accepted Answer

Mucosa, submucosa, muscularis externa, serosa

Question 11

Which of the following best explains why vitamin B12 absorption is impaired in patients with chronic gastritis?

Accepted Answer

Reduced production of intrinsic factor by parietal cells

Question 12

A patient has a tumor in the submucosal layer of the small intestine. Which of the following is most likely to be affected?

Accepted Answer

Blood vessels and lymphatics

Question 13

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

Accepted Answer

Absorption of water and compaction of waste

Question 14

Which of the following statements about the mesenteries is correct?

Accepted Answer

They provide a pathway for blood vessels, nerves, and lymphatics to reach the digestive organs

Question 15

Which of the following teeth are designed for cutting food?

Accepted Answer

Incisors

Question 16

Which nerve controls both intrinsic and extrinsic muscles of the tongue?

Accepted Answer

Hypoglossal nerve (N XII)

Question 17

Which of the following is a consequence of aging on the digestive system?

Accepted Answer

Decreased smooth muscle tone and increased constipation

Question 18

Which of the following best describes segmentation in the digestive tract?

Accepted Answer

Cycles of contraction that churn and fragment the bolus

Question 19

Which of the following is the main function of bile produced by the liver?

Accepted Answer

Emulsification of fats

Question 20

A patient has a deficiency in pancreatic amylase. Which process will be most affected?

Accepted Answer

Digestion of carbohydrates

Comprehensive Study Notes: The Digestive System

Study Guide - Practice Questions