Question 1

Which of the following best describes the function of the alimentary canal?

Accepted Answer

It is a continuous muscular tube that digests and absorbs food.

Question 2

Which organs are considered accessory digestive organs?

Accepted Answer

Liver, pancreas, gallbladder

Question 3

Peristalsis and segmentation are both types of digestive tract movements. Which statement correctly differentiates them?

Accepted Answer

Peristalsis propels food forward, while segmentation mixes food.

Question 4

Which of the following is NOT one of the five chemicals used in digestion?

Accepted Answer

Insulin

Question 5

The enteric nervous system is also referred to as:

Accepted Answer

The brain of the gut

Question 6

Short reflexes in the digestive system are initiated by:

Accepted Answer

Local stimuli within the GI tract

Question 7

Which of the following is a function of the liver?

Accepted Answer

Producing bile to emulsify fats

Question 8

If a patient has their gallbladder removed, which type of food should they avoid to prevent digestive discomfort?

Accepted Answer

High-fat foods

Question 9

Which enzyme begins the breakdown of starch in the mouth, and what is its optimal pH?

Accepted Answer

Amylase; pH 7

Question 10

A patient presents with GERD. What is occurring physiologically?

Accepted Answer

The lower esophageal sphincter is weak, allowing stomach acid to reflux into the esophagus.

Question 11

Which structure surrounds the cardial orifice and why is it important?

Accepted Answer

The lower esophageal sphincter; prevents acid reflux.

Question 12

Which of the following is true regarding the pH of pancreatic juice?

Accepted Answer

It is alkaline, with a pH around 8.

Question 13

A patient with an autoimmune disease affecting the stomach is unable to absorb vitamin B12. Which treatment is most appropriate?

Accepted Answer

Vitamin B12 injections

Question 14

Which subdivision of the small intestine is primarily responsible for nutrient absorption?

Accepted Answer

Jejunum

Question 15

Periodontitis is a risk factor for which cardiovascular condition?

Accepted Answer

Atherosclerosis

Question 16

Which two factors can lead to the formation of an ulcer in the digestive tract?

Accepted Answer

Helicobacter pylori infection and chronic NSAID use

Question 17

During defecation, which nervous system signals are primarily responsible for initiating the process?

Accepted Answer

Parasympathetic signals

Question 18

Valsalva’s Maneuver is used to assist in defecation. Which equation best describes the increase in intra-abdominal pressure during this maneuver?

Accepted Answer

$$ P = F \div A $$

Question 19

Which of the following is a function of the appendix?

Accepted Answer

Storing beneficial gut bacteria

Question 20

A patient is experiencing flatulence. Which process is most directly responsible for this symptom?

Accepted Answer

Bacterial fermentation of undigested carbohydrates in the large intestine

Chapter 23: The Digestive System – Comprehensive Study Notes

Study Guide - Practice Questions