Question 1

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

Accepted Answer

Small intestine

Question 2

What is the main function of the mucosa layer in the alimentary canal?

Accepted Answer

Absorption of nutrients

Question 3

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

Accepted Answer

Coordinates mixing and propulsion reflexes

Question 4

A patient presents with difficulty swallowing and food getting stuck in the esophagus. Which muscular action is most likely impaired?

Accepted Answer

Peristalsis

Question 5

Which of the following organs is retroperitoneal?

Accepted Answer

Pancreas

Question 6

What is the primary function of the greater omentum?

Accepted Answer

Covers and protects abdominal organs

Question 7

Which enzyme is responsible for the initial chemical digestion of carbohydrates in the mouth?

Accepted Answer

Salivary amylase

Question 8

A patient with a deficiency in intrinsic factor is at risk for which condition?

Accepted Answer

Pernicious anemia

Question 9

Which of the following best explains why the stomach does not digest itself?

Accepted Answer

It is protected by a layer of bicarbonate-rich mucus

Question 10

During which phase of gastric secretion is the stomach prepared for incoming food by the sight, smell, or thought of food?

Accepted Answer

Cephalic phase

Question 11

Which of the following is a function of hydrochloric acid ($$HCl) in $$the stomach?

Accepted Answer

Denatures proteins and activates pepsinogen

Question 12

A patient with a history of Helicobacter pylori infection is most at risk for which of the following?

Accepted Answer

Gastric ulcers

Question 13

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

Accepted Answer

Mixing contractions that churn and fragment the digestive contents

Question 14

Which of the following teeth are specialized for tearing or piercing food?

Accepted Answer

Canines

Question 15

Which of the following best explains the difference between serosa and adventitia?

Accepted Answer

Serosa is a connective tissue layer in intraperitoneal organs, adventitia is in retroperitoneal organs

Question 16

Which of the following is a correct sequence of layers in the wall of the alimentary canal from innermost to outermost?

Accepted Answer

Mucosa, submucosa, muscularis externa, serosa

Question 17

A patient with a blockage at the pyloric sphincter would have difficulty moving food from the ______ to the ______.

Accepted Answer

Stomach; duodenum

Question 18

Which of the following best describes the function of gastrin?

Accepted Answer

Stimulates stomach secretions and motility

Question 19

Which of the following is a function of saliva?

Accepted Answer

Moistens food and begins carbohydrate digestion

Question 20

A patient with a lack of tight junctions between epithelial cells in the stomach would most likely experience which of the following?

Accepted Answer

Ulceration of the stomach lining

The Digestive System: Structure and Function

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