$$2 \times \text{ATP} + 2 \times \text{NADH} \rightarrow 2 \times 2.5 \text{ATP} + 2 \text{ATP} = 7 \text{ATP}$$

Question 1

Which layer of the digestive tract contains glands, nerve fibers, and blood vessels, and is primarily responsible for peristalsis?

Accepted Answer

Muscularis

Question 2

During mastication, which of the following best describes the primary function?

Accepted Answer

Mechanical breakdown of food into smaller pieces

Question 3

Which of the following best describes the process of deglutination?

Accepted Answer

The act of swallowing food

Question 4

Peristalsis is essential for which of the following functions in the digestive system?

Accepted Answer

Movement of food along the digestive tract

Question 5

Which gastric gland cell is responsible for secreting gastrin, and what is the primary function of gastrin?

Accepted Answer

G-cell; stimulates secretion of gastric acid

Question 6

Which of the following is NOT a function of the brush border enzymes in the small intestine?

Accepted Answer

Activating pancreatic proenzymes

Question 7

A patient has a blockage in the hepatic portal vein. Which of the following processes would be most directly affected?

Accepted Answer

Delivery of absorbed nutrients from the intestines to the liver

Question 8

Which of the following best describes the function of the gall bladder?

Accepted Answer

Storage and concentration of bile

Question 9

Which pancreatic enzyme is responsible for the breakdown of proteins, and is secreted as a proenzyme?

Accepted Answer

Trypsinogen

Question 10

Which of the following best describes catabolism in metabolism?

Accepted Answer

The breakdown of complex molecules into simpler ones, releasing energy

Question 11

A patient is unable to digest carbohydrates properly. Which enzyme deficiency in the small intestine brush border is most likely responsible?

Accepted Answer

Maltase

Question 12

Where does the majority of lipid digestion occur, and which enzyme is primarily responsible?

Accepted Answer

Small intestine; pancreatic lipase

Question 13

Which of the following best explains the difference between 'good cholesterol' and 'bad cholesterol'?

Accepted Answer

'Good cholesterol' refers to HDL, which transports cholesterol to the liver for excretion

Question 14

During the absorptive state, which of the following processes predominates?

Accepted Answer

Anabolism and nutrient storage

Question 15

Which of the following equations correctly represents the net ATP yield from glycolysis under aerobic conditions?

Accepted Answer

$$2 	imes 	ext{ATP} + 2 	imes 	ext{NADH} ightarrow 2 	imes 2.5 	ext{ATP} + 2 	ext{ATP} = 7 	ext{ATP}$$

Question 16

A patient with chronic pancreatitis is unable to digest proteins efficiently. Which process is most likely impaired?

Accepted Answer

Activation of proenzymes such as trypsinogen in the small intestine

Question 17

Which of the following best describes the primary function of the liver in digestion and metabolism?

Accepted Answer

Processing and detoxification of absorbed nutrients

Question 18

Which process occurs in the large intestine?

Accepted Answer

Water and electrolyte absorption

Question 19

Which of the following best describes anabolism?

Accepted Answer

Synthesis of complex molecules from simpler ones

Question 20

A patient is in the postabsorptive state. Which of the following processes is most likely occurring?

Accepted Answer

Gluconeogenesis

Anatomy & Physiology: Digestion and Metabolism Study Guide

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