Question 1

Which of the following best explains why animals must obtain essential amino acids from their diet?

Accepted Answer

Essential amino acids are required for protein synthesis but cannot be synthesized by the animal's body.

Question 2

Why are fat-soluble vitamins more likely to cause toxicity in the body compared to water-soluble vitamins?

Accepted Answer

Fat-soluble vitamins are stored in body tissues and do not dissolve in water, leading to accumulation.

Question 3

A patient is diagnosed with a deficiency in bile production. Which of the following processes would be most directly affected?

Accepted Answer

Emulsification and absorption of dietary fats

Question 4

Which of the following best describes the difference between undernourishment and malnourishment?

Accepted Answer

Undernourishment is a deficiency in calories, while malnourishment is a deficiency in one or more essential nutrients.

Question 5

Which of the following is the correct sequence of food processing in animals?

Accepted Answer

Ingestion $$\rightarrow$$ Digestion $$\rightarrow$$ Absorption $$\rightarrow$$ Elimination

Question 6

Why are nutrients from a recently ingested meal not considered 'inside' the body until absorption occurs?

Accepted Answer

Because the alimentary canal is continuous with the external environment and nutrients must cross a membrane to enter the body.

Question 7

A person has a mutation that prevents the formation of sphincters in the digestive tract. Which of the following is a likely consequence?

Accepted Answer

Food would not be properly compartmentalized during digestion, leading to inefficient processing.

Question 8

Which of the following best explains why pepsin does not function in the small intestine?

Accepted Answer

Pepsin requires a highly acidic environment to maintain its tertiary structure, which is not present in the small intestine.

Question 9

Which of the following is a function of the villi in the small intestine?

Accepted Answer

Increasing surface area to enhance nutrient absorption

Question 10

After triglycerides are digested and absorbed by the epithelial cells of the villi, how are they transported from the intestine?

Accepted Answer

They are packaged into chylomicrons and enter the lymphatic system via lacteals.

Question 11

Which of the following best describes the role of the hepatic portal vein in nutrient absorption?

Accepted Answer

It transports absorbed monosaccharides and amino acids from the small intestine to the liver for processing.

Question 12

A grazing animal has a much longer alimentary canal than a carnivore of similar size. What is the most likely explanation for this difference?

Accepted Answer

Herbivores require longer canals to ferment and digest cellulose-rich plant material.

Question 13

Which of the following is a major function of the colon?

Accepted Answer

Absorbing water and electrolytes to form solid feces

Question 14

Which of the following best describes the mutualistic relationship between humans and their gut bacteria?

Accepted Answer

Humans provide a nutrient-rich environment, and bacteria perform functions that benefit human health.

Question 15

A mammal skull is found with large, flat molars and a gap between the front and back teeth. What can you infer about its diet?

Accepted Answer

It is likely an herbivore, adapted for grinding tough plant material.

Question 16

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

Accepted Answer

Insulin facilitates the uptake of glucose by body cells when blood glucose levels rise.

Question 17

A person consumes more calories than their liver and muscle cells can store as glycogen. What happens to the excess energy?

Accepted Answer

It is stored as fat in adipose tissue.

Question 18

Which of the following health problems is NOT directly related to obesity?

Accepted Answer

Scurvy

Question 19

Leptin is a hormone involved in regulating body fat levels. What is its primary function?

Accepted Answer

It signals the brain about the body's energy stores to help maintain stable body weight.

Question 20

Which of the following best describes the process of fat absorption in the small intestine?

Accepted Answer

Fats are emulsified by bile, broken down by enzymes, absorbed by intestinal cells, and transported as chylomicrons into the lymphatic system.

Animal Nutrition Study Guide – Step-by-Step Guidance

스터디 가이드 - 연습 문제