Question 1

Which structure is NOT considered an accessory digestive organ as shown in Fig. 23.1?

Accepted Answer

Esophagus

Question 2

According to Fig. 23.5, which layer of the alimentary canal is primarily responsible for peristalsis?

Accepted Answer

Muscularis externa

Question 3

Which of the following best describes the microscopic anatomy of the liver as shown in Fig. 23.22?

Accepted Answer

Liver lobules are hexagonal structures containing a central vein and portal triads at each corner.

Question 4

The synthesis/storage of bile is most closely associated with which organ?

Accepted Answer

Liver

Question 5

Which equation best represents the chemical reaction for the breakdown of starch by salivary amylase?

Accepted Answer

$$\mathrm{Starch} + \mathrm{H_2O} \xrightarrow{amylase} \mathrm{Maltose}$$

Question 6

A patient with a blocked bile duct would most likely experience which of the following symptoms?

Accepted Answer

Fat malabsorption and steatorrhea

Question 7

Which phase of swallowing involves the voluntary movement of the bolus from the mouth to the oropharynx?

Accepted Answer

Oral phase

Question 8

Which of the following is a function of the pancreas in digestion?

Accepted Answer

Release of digestive enzymes into the duodenum

Question 9

Which structure is responsible for the absorption of the majority of nutrients in the digestive tract?

Accepted Answer

Small intestine

Question 10

Which of the following best describes the relationship between the liver, gallbladder, and pancreas as shown in Fig. 23.21?

Accepted Answer

They are connected by ducts that empty into the duodenum.

Question 11

Which of the following is NOT a function of the large intestine?

Accepted Answer

Digestion of proteins

Question 12

During the gastric phase of digestion, which hormone stimulates the secretion of gastric juice?

Accepted Answer

Gastrin

Question 13

Which of the following structures is NOT part of the alimentary canal as shown in Fig. 23.1?

Accepted Answer

Pancreas

Question 14

Which process is most directly affected by a deficiency in pancreatic lipase?

Accepted Answer

Fat digestion

Question 15

Which of the following best explains the function of villi in the small intestine?

Accepted Answer

They increase the surface area for absorption.

Question 16

A patient presents with jaundice. Which organ is most likely malfunctioning?

Accepted Answer

Liver

Question 17

Which of the following is the correct sequence of the layers of the alimentary canal from innermost to outermost as shown in Fig. 23.5?

Accepted Answer

Mucosa, submucosa, muscularis externa, serosa

Question 18

Which of the following best describes the role of cholecystokinin (CCK) in digestion?

Accepted Answer

Stimulates release of pancreatic enzymes and bile

Question 19

Which of the following is a correct function of gastric glands?

Accepted Answer

Production of hydrochloric acid

Question 20

Which of the following best describes the process of peristalsis?

Accepted Answer

Rhythmic contraction of circular and longitudinal muscles to propel food forward

Study Guide: The Digestive System (Chapter 23)

Study Guide - Practice Questions