$$\text{C}_6\text{H}_{12}\text{O}_6 + 6\text{O}_2 \rightarrow 6\text{CO}_2 + 6\text{H}_2\text{O} + \text{ATP}$$

$$\text{Energy intake} = \text{Total energy output}$$

Question 1

Which of the following best describes the function of the mucosa layer in the alimentary canal?

Accepted Answer

It produces digestive enzymes and absorbs nutrients.

Question 2

A patient presents with difficulty absorbing fat-soluble vitamins (K, D, E, and A). Which organ is most likely impaired?

Accepted Answer

Gallbladder

Question 3

Which process is responsible for moving food from the pharynx to the esophagus?

Accepted Answer

Peristalsis

Question 4

During carbohydrate metabolism, which equation represents the overall process of cellular respiration?

Accepted Answer

$$	ext{C}_6	ext{H}_{12}	ext{O}_6 + 6	ext{O}_2 ightarrow 6	ext{CO}_2 + 6	ext{H}_2	ext{O} + 	ext{ATP}$$

Question 5

Which enzyme is responsible for the initial breakdown of starch in the mouth?

Accepted Answer

Salivary amylase

Question 6

A patient with uncontrolled diabetes mellitus is at risk for ketoacidosis. What is the primary cause of this condition?

Accepted Answer

Excessive breakdown of fats

Question 7

Which structure prevents food from entering the nasal cavity during swallowing?

Accepted Answer

Soft palate

Question 8

Which hormone stimulates the release of pancreatic juice and bile into the duodenum?

Accepted Answer

Cholecystokinin (CCK)

Question 9

Which of the following is NOT absorbed in the stomach?

Accepted Answer

Glucose

Question 10

Which layer of the alimentary canal contains blood vessels, nerve endings, and lymphatic vessels?

Accepted Answer

Submucosa

Question 11

Which process describes the formation of glucose from non-carbohydrate sources in the liver?

Accepted Answer

Gluconeogenesis

Question 12

Which of the following is a function of bile?

Accepted Answer

Emulsifies fats

Question 13

Which of the following is true regarding the absorption of lipids in the small intestine?

Accepted Answer

Lipids are absorbed by diffusion.

Question 14

Which structure is responsible for voluntary control during defecation?

Accepted Answer

External anal sphincter

Question 15

Which of the following is a major function of the liver in metabolism?

Accepted Answer

Detoxification of ammonia to urea

Question 16

Which equation best represents the energy balance in the human body?

Accepted Answer

$$	ext{Energy intake} = 	ext{Total energy output}$$

Question 17

Which of the following is a structural modification of the small intestine that increases surface area for absorption?

Accepted Answer

Villi

Question 18

Which lipoprotein is considered 'good' because it transports cholesterol from body cells to the liver for elimination?

Accepted Answer

High-density lipoprotein (HDL)

Question 19

A patient has a deficiency in albumin production. Which organ is most likely affected?

Accepted Answer

Liver

Question 20

Which of the following is a consequence of excessive fat breakdown in the body?

Accepted Answer

Acidosis (ketoacidosis)

The Digestive System and Body Metabolism: Structure, Function, and Processes

Study Guide - Practice Questions