Question 1

Which of the following best describes an essential nutrient for animals?

Accepted Answer

A nutrient required for growth, development, and reproduction that must be obtained from the diet.

Question 2

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

Accepted Answer

Combine different plant proteins, such as beans and corn, throughout the day.

Question 3

Which of the following is a consequence of undernourishment?

Accepted Answer

The body breaks down its own tissues to provide energy.

Question 4

Which vitamin is a component of coenzyme A and is essential for metabolism?

Accepted Answer

Vitamin B5 (pantothenic acid)

Question 5

A person consumes a carbohydrate-rich meal. Which hormone is released to help regulate blood glucose levels, and what is its effect?

Accepted Answer

Insulin; stimulates the uptake of glucose into cells and storage as glycogen.

Question 6

Which of the following feeding mechanisms is used by blue whales to consume krill?

Accepted Answer

Suspension (filter) feeding

Question 7

Why do herbivores typically have longer digestive tracts than carnivores?

Accepted Answer

To allow more time and surface area for the breakdown and absorption of fibrous plant material.

Question 8

Which of the following statements about vitamins is correct?

Accepted Answer

Fat-soluble vitamins can accumulate to toxic levels if taken in excess.

Question 9

What is the primary function of bile in the digestive process?

Accepted Answer

To emulsify fats, increasing their surface area for enzymatic digestion.

Question 10

Which of the following best explains why vertebrates cannot digest cellulose without the help of symbiotic microorganisms?

Accepted Answer

Vertebrates lack the enzymes required to break the β-glycosidic bonds in cellulose.

Question 11

Which of the following is a correct sequence of energy storage utilization in humans during fasting?

Accepted Answer

Liver glycogen → muscle glycogen → fat

Question 12

Which hormone is secreted by the stomach and triggers a feeling of hunger before meals?

Accepted Answer

Ghrelin

Question 13

A deficiency in which mineral can lead to goiter, a swelling of the thyroid gland?

Accepted Answer

Iodine

Question 14

Which of the following best describes the role of the enteric division of the nervous system in digestion?

Accepted Answer

It regulates the digestive process by coordinating muscle contractions and enzyme release.

Question 15

Which of the following equations correctly represents the conversion of chemical energy from food into ATP during 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 16

Which of the following is a water-soluble vitamin that functions as a cofactor for enzymes and whose deficiency can cause scurvy?

Accepted Answer

Vitamin C

Question 17

A patient is diagnosed with type 1 diabetes. Which of the following best explains the underlying cause?

Accepted Answer

The patient's immune system destroys pancreatic beta cells, reducing insulin production.

Question 18

Which of the following best describes the process of peristalsis?

Accepted Answer

The rhythmic contraction of smooth muscles to move food through the digestive tract.

Question 19

Which of the following is a likely consequence of a diet deficient in essential fatty acids?

Accepted Answer

Impaired synthesis of certain hormones and cell membrane components.

Question 20

Which of the following statements about the absorption of fats in the small intestine is correct?

Accepted Answer

Fatty acids are packaged into chylomicrons, which enter the lymphatic system before reaching the bloodstream.

Animal Nutrition: Structure, Function, and Regulation

Study Guide - Practice Questions