Question 1

Which of the following best describes the main function of the alimentary canal in the digestive system?

Accepted Answer

It digests food and absorbs nutrient molecules into the bloodstream.

Question 2

Which of the following organs is considered an accessory digestive organ?

Accepted Answer

Pancreas

Question 3

A patient presents with inflammation of the peritoneum following a ruptured appendix. What is the most likely diagnosis?

Accepted Answer

Peritonitis

Question 4

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

Accepted Answer

Muscularis externa

Question 5

What is the primary function of the myenteric nerve plexus?

Accepted Answer

Control of GI tract motility

Question 6

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

Accepted Answer

It mixes food with digestive juices by local constriction and relaxation.

Question 7

A patient with Sjögren’s syndrome is likely to experience which of the following symptoms related to the digestive system?

Accepted Answer

Dry mouth (xerostomia)

Question 8

Which of the following is NOT a function of saliva?

Accepted Answer

Absorbing nutrients directly into the bloodstream

Question 9

Which of the following statements about the peritoneum is correct?

Accepted Answer

The peritoneal cavity is a fluid-filled space between the visceral and parietal peritoneum.

Question 10

Which of the following best explains why the esophagus is covered by adventitia rather than serosa?

Accepted Answer

It is a retroperitoneal organ and needs to be anchored to surrounding structures.

Question 11

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 12

Which of the following is a function of the lamina propria in the mucosa of the alimentary canal?

Accepted Answer

Provides nourishment and absorption via its capillary network

Question 13

A patient has a blockage in the hepatic portal vein. Which of the following processes would be most directly affected?

Accepted Answer

Delivery of nutrient-rich blood from digestive organs to the liver

Question 14

Which of the following best describes the effect of the parasympathetic nervous system on digestive activity?

Accepted Answer

It enhances digestive processes.

Question 15

Which of the following papillae on the tongue does NOT contain taste buds?

Accepted Answer

Filiform papillae

Question 16

A child is born with an extremely short lingual frenulum, resulting in restricted tongue movement. What is the most likely consequence?

Accepted Answer

Distorted speech due to limited tongue mobility

Question 17

Which of the following teeth are best adapted for grinding food?

Accepted Answer

Molars

Question 18

Which of the following is a risk factor for periodontitis that may also increase the risk of heart disease and stroke?

Accepted Answer

Smoking

Question 19

Which of the following equations best represents the dental formula for permanent teeth in humans?

Accepted Answer

$$2I, 1C, 2PM, 3M ($$upper) / $$2I, 1C, 2PM, 3M ($$lower) 	imes 2$

Question 20

Which of the following best explains why enamel cannot heal if it decays or cracks?

Accepted Answer

Enamel-producing cells degenerate when the tooth erupts.

Digestive System: Structure, Function, and Associated Organs

Study Guide - Practice Questions