Question 1

Which of the following is NOT considered a primary organ of the digestive system?

Accepted Answer

Teeth

Question 2

What is the main function of the muscularis layer in the digestive tract?

Accepted Answer

Propulsion and mixing of food via smooth muscle contractions

Question 3

During peristalsis, which muscle layers coordinate to move a bolus through the digestive tract?

Accepted Answer

Circular and longitudinal muscle layers

Question 4

Which of the following best describes the function of the greater omentum?

Accepted Answer

It contains a thick layer of adipose tissue and insulates abdominal organs

Question 5

A patient presents with difficulty swallowing. Which muscle group is most likely impaired?

Accepted Answer

Pharyngeal constrictors

Question 6

Which layer of the digestive tract contains large blood vessels, lymphatics, and submucosal neural plexuses?

Accepted Answer

Submucosa

Question 7

What is the primary function of the parotid salivary gland?

Accepted Answer

Production of saliva rich in salivary amylase

Question 8

Which anatomical feature separates the oral cavity from the nasal cavity?

Accepted Answer

Hard palate

Question 9

Which of the following teeth types is primarily responsible for tearing and slashing food?

Accepted Answer

Canines (cuspids)

Question 10

A patient has a blockage in the esophageal hiatus. Which process would be most directly affected?

Accepted Answer

Movement of food from the pharynx to the stomach

Question 11

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

Accepted Answer

Mechanical digestion and manipulation of food

Question 12

Which of the following correctly matches the digestive tract layer with its description?

Accepted Answer

Muscularis: contains circular and longitudinal smooth muscle fibers

Question 13

Which process involves the progressive dehydration of organic wastes in the digestive system?

Accepted Answer

Compaction

Question 14

During segmentation in the small intestine, what is the primary result?

Accepted Answer

Churning and fragmentation of intestinal contents

Question 15

Which of the following equations best represents the relationship between the number of deciduous and permanent teeth in humans?

Accepted Answer

$$N_{deciduous} + N_{permanent} = 52$$

Question 16

Which structure anchors the root of the tooth to the alveolus?

Accepted Answer

Periodontal ligament

Question 17

Which of the following is TRUE regarding the serosa layer of the digestive tract?

Accepted Answer

It is the outermost layer and is present only within the peritoneal cavity

Question 18

A patient with damage to the palatoglossal arch would most likely have difficulty with which function?

Accepted Answer

Separating the oral cavity from the nasopharynx

Question 19

Which of the following is a correct sequence of the passage of food through the primary organs of the digestive system?

Accepted Answer

Oral cavity → pharynx → esophagus → stomach → small intestine → large intestine

Question 20

Which of the following best describes the role of the mesenteries in the digestive system?

Accepted Answer

They stabilize the position of organs and provide a route for blood vessels, nerves, and lymphatics

Chapter 25: The Digestive System – Structure and Function

Study Guide - Practice Questions