Question 1

Which of the following is NOT one of the four basic digestive processes?

Accepted Answer

Filtration

Question 2

The GI tract secretes about 7 L of fluid daily. Which of the following best describes the primary function of these secretions?

Accepted Answer

They provide lubrication and enzymes for digestion.

Question 3

Which layer of the GI tract is primarily responsible for absorption of nutrients?

Accepted Answer

Mucosa

Question 4

A patient has damage to the myenteric plexus. Which digestive process is most likely to be affected?

Accepted Answer

Motility

Question 5

Which of the following statements about the enteric nervous system (ENS) is TRUE?

Accepted Answer

It can function independently of the central nervous system.

Question 6

Which of the following best describes the role of the submucosal plexus?

Accepted Answer

Regulates secretion and blood flow in the GI tract.

Question 7

During digestion, which process is responsible for moving food through the GI tract?

Accepted Answer

Peristalsis

Question 8

Which of the following is a function of the muscularis externa in the GI tract?

Accepted Answer

Provides the force for peristalsis and segmentation.

Question 9

If the mucosal layer of the GI tract is damaged, which of the following is most likely to be impaired?

Accepted Answer

Absorption of nutrients

Question 10

Which of the following best explains why the GI tract has such a large surface area for absorption?

Accepted Answer

Presence of villi and microvilli increases the surface area.

Question 11

A patient is unable to digest fats properly. Which digestive process is most likely impaired?

Accepted Answer

Secretion of bile

Question 12

Which of the following is a protective function of the GI tract?

Accepted Answer

Mucus secretion to prevent damage from digestive enzymes

Question 13

Which equation best represents the relationship between surface area ($$A$$), length ($$L$$), and radius ($$r) of a $$cylindrical section of the GI tract?

Accepted Answer

$$A = 2\pi r L$$

Question 14

Which of the following is TRUE regarding the role of GALT (gut-associated lymphoid tissue)?

Accepted Answer

It provides immune defense against pathogens in the GI tract.

Question 15

A patient presents with decreased motility in the GI tract. Which neural structure is most likely affected?

Accepted Answer

Myenteric plexus

Question 16

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

Accepted Answer

Mixing contractions that increase contact with digestive enzymes

Question 17

Which process is most directly responsible for the movement of nutrients from the GI lumen into the blood?

Accepted Answer

Absorption

Question 18

Which of the following is a function of the serosa layer of the GI tract?

Accepted Answer

Provides structural support and reduces friction with other organs

Question 19

If a patient has a deficiency in mucus production in the GI tract, which of the following is most likely to occur?

Accepted Answer

Increased risk of damage to the mucosal lining

Question 20

Which of the following best describes the function of the submucosa in the GI tract?

Accepted Answer

Contains blood vessels, lymphatics, and nerves that support the mucosa

Study Guide: Chapter 21 – The Digestive System

Study Guide - Practice Questions

Study Guide - Flashcards