Question 1

Which of the following best describes the three nutritional needs that an animal's diet must satisfy?

Accepted Answer

Supply chemical energy, provide organic molecules, and supply essential nutrients

Question 2

A patient is diagnosed with a deficiency in essential amino acids. Which of the following is the most likely consequence?

Accepted Answer

The patient will be unable to synthesize all necessary proteins, leading to impaired body function.

Question 3

Which feeding mechanism is correctly matched with its example?

Accepted Answer

Suspension feeder – whale shark

Question 4

Which of the following correctly lists the four major stages of food processing in animals, in order?

Accepted Answer

Ingestion, digestion, absorption, elimination

Question 5

Which statement best distinguishes between intracellular and extracellular digestion?

Accepted Answer

Intracellular digestion occurs within cells, while extracellular digestion occurs outside cells in compartments such as the alimentary canal.

Question 6

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

Accepted Answer

Presence of villi and microvilli

Question 7

A person has a malfunctioning pancreas that cannot secrete bicarbonate ($\mathrm{HCO_3^-}$). What is the most likely consequence in the small intestine?

Accepted Answer

The pH in the small intestine will remain acidic, impairing enzyme function.

Question 8

Which of the following best explains the role of the liver in digestion?

Accepted Answer

It produces bile, which emulsifies fats in the small intestine.

Question 9

A patient with a damaged gall bladder would have difficulty digesting which type of nutrient?

Accepted Answer

Lipids

Question 10

Which of the following is a correct sequence of events for the regulation of blood glucose after a carbohydrate-rich meal?

Accepted Answer

Blood glucose rises $\rightarrow$ pancreas releases insulin $\rightarrow$ cells take up glucose $\rightarrow$ blood glucose falls

Question 11

Which of the following best describes the function of peristalsis in the digestive tract?

Accepted Answer

It propels food along the alimentary canal by rhythmic contractions of smooth muscle.

Question 12

Which adaptation would you expect to find in the digestive system of a strict herbivore compared to a carnivore?

Accepted Answer

A longer alimentary canal to facilitate cellulose digestion

Question 13

Which of the following is an example of a feedback circuit regulating digestion?

Accepted Answer

The release of gastrin from the stomach in response to food, which stimulates further secretion of gastric juice

Question 14

A mutation causes an animal to lack mutualistic microorganisms in its gut. Which of the following is a likely consequence?

Accepted Answer

Reduced ability to digest cellulose and synthesize certain vitamins

Question 15

Which of the following best describes the function of the cecum in herbivorous mammals?

Accepted Answer

It houses bacteria that help digest cellulose.

Question 16

A person consumes a meal high in protein. Which enzyme is primarily responsible for initiating protein digestion in the stomach?

Accepted Answer

Pepsin

Question 17

Which of the following is a correct description of the function of sphincters in the digestive system?

Accepted Answer

They regulate the passage of material between digestive compartments.

Question 18

A patient is unable to produce sufficient insulin. Which of the following is the most likely effect on blood glucose regulation?

Accepted Answer

Blood glucose levels will remain elevated after meals.

Question 19

Which of the following best explains why ruminant animals, such as cows, can digest cellulose efficiently?

Accepted Answer

They have a multi-chambered stomach housing mutualistic microorganisms that break down cellulose.

Question 20

A person has a genetic mutation that prevents the secretion of amylase in the oral cavity. Which of the following is the most likely consequence?

Accepted Answer

Initial digestion of starches will be impaired, leading to slower carbohydrate breakdown.

Animal Nutrition and Digestion: Study Guide

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