Question 1

Which of the following best describes the main function of the mammalian stomach in the digestive process?

Accepted Answer

Mechanical and chemical digestion of proteins, and storage of food

Question 2

A vegetarian wants to ensure they get all essential amino acids. Which dietary strategy is most effective?

Accepted Answer

Combine a variety of plant proteins throughout the day

Question 3

Which of the following is an example of negative feedback in nutrient regulation?

Accepted Answer

Insulin release after a carbohydrate-rich meal, lowering blood glucose

Question 4

Which equation correctly represents the enzymatic hydrolysis of sucrose?

Accepted Answer

$$\mathrm{C$$_{12}$$H_{22}O$$_{11}} + \mathrm{H_2O} \xrightarrow{	ext{sucrase}} \mathrm{C_6H_{12}$$O_6$$} + \mathrm{C_6H_{12}$$O_6$$}$

Question 5

Which adaptation is most likely found in the digestive system of a herbivore compared to a carnivore?

Accepted Answer

Longer alimentary canal and a larger cecum

Question 6

What is the primary role of bile in digestion?

Accepted Answer

Emulsifying fats to aid in their digestion and absorption

Question 7

Which of the following best explains why most plant proteins are considered 'incomplete'?

Accepted Answer

They do not contain all essential amino acids in sufficient quantities

Question 8

A patient is diagnosed with hyponatremia (low sodium levels). Which mineral imbalance is most directly involved?

Accepted Answer

Sodium

Question 9

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

Accepted Answer

Absorption of most nutrients

Question 10

Which process is responsible for moving food through the esophagus to the stomach?

Accepted Answer

Peristalsis

Question 11

Why do animals with a herbivorous diet often have a larger cecum or fermentation chamber?

Accepted Answer

To house mutualistic microbes that digest cellulose

Question 12

Which of the following best describes the role of insulin in glucose homeostasis?

Accepted Answer

Triggers synthesis of glycogen from glucose after a carbohydrate-rich meal

Question 13

Which of the following is a correct sequence of the four main stages of food processing in animals?

Accepted Answer

Ingestion, digestion, absorption, elimination

Question 14

A person with a damaged liver may have difficulty with which of the following digestive processes?

Accepted Answer

Emulsification of fats due to reduced bile production

Question 15

Which of the following best explains why the small intestine has a large surface area?

Accepted Answer

To maximize nutrient absorption through villi and microvilli

Question 16

Which feeding mechanism is used by baleen whales, as shown in the provided images?

Accepted Answer

Suspension/filter feeding

Question 17

If a person’s pancreas fails to secrete bicarbonate into the duodenum, what is the most likely consequence?

Accepted Answer

Acidic chyme will damage the lining of the small intestine

Question 18

Which of the following is a function of the gut microbiome in humans?

Accepted Answer

Regulation of gut epithelium development and vitamin production

Question 19

A person is fasting for 24 hours. Which energy source will their body use first after liver glycogen is depleted?

Accepted Answer

Muscle glycogen

Question 20

Which of the following best describes the function of sphincters in the mammalian digestive system?

Accepted Answer

Regulate movement of material between digestive compartments

Animal Nutrition and the Digestive System: Structure, Function, and Regulation

Study Guide - Practice Questions