Question 1

Which of the following best describes the four main steps of animal nutrition in the correct order?

Accepted Answer

Ingestion, digestion, absorption, elimination

Question 2

Which of the following is an essential nutrient for humans that must be obtained from the diet because it cannot be synthesized by the body?

Accepted Answer

Essential amino acids

Question 3

A patient is diagnosed with a vitamin C deficiency. Which of the following symptoms is most likely to be observed?

Accepted Answer

Scurvy and degeneration of teeth and gums

Question 4

Which organ is primarily responsible for the chemical digestion of proteins in the human digestive system?

Accepted Answer

Stomach

Question 5

What is the main function of bile salts secreted by the liver and stored in the gallbladder?

Accepted Answer

Emulsifying fats to aid in lipid digestion

Question 6

Which of the following statements about the role of insulin in glucose homeostasis is correct?

Accepted Answer

Insulin decreases blood glucose by promoting glycogen synthesis.

Question 7

A person with type 1 diabetes mellitus is likely to experience which of the following if untreated?

Accepted Answer

High blood glucose due to lack of insulin production

Question 8

Which of the following best explains why water is absorbed passively in the small intestine?

Accepted Answer

Water follows the absorption of solutes by osmosis.

Question 9

Which of the following is a function of the large intestine in humans?

Accepted Answer

Absorption of additional water and formation of feces

Question 10

A patient presents with frequent urination and high blood glucose levels. Which physiological mechanism best explains the increased urine output?

Accepted Answer

High glucose in the filtrate increases osmolarity, reducing water reabsorption

Question 11

Which of the following is a primary risk factor for developing type 2 diabetes mellitus?

Accepted Answer

Obesity and high-sugar diets

Question 12

Which of the following best describes the advantage of a complete digestive tract over an incomplete digestive tract?

Accepted Answer

It allows for simultaneous ingestion and elimination of waste.

Question 13

Which enzyme is responsible for the initial breakdown of starch in the mouth?

Accepted Answer

Salivary amylase

Question 14

Which cells in the stomach secrete hydrochloric acid (HCl)?

Accepted Answer

Parietal cells

Question 15

A person is unable to absorb vitamin B12 due to a lack of intrinsic factor. Which organ is most likely malfunctioning?

Accepted Answer

Stomach

Question 16

Which of the following best explains why ruminants can digest cellulose but humans cannot?

Accepted Answer

Ruminants have symbiotic microbes that produce cellulase.

Question 17

Which of the following is a correct statement about the role of the pancreas in digestion?

Accepted Answer

It secretes digestive enzymes into the small intestine.

Question 18

Which of the following best describes the negative feedback system involving insulin and glucagon?

Accepted Answer

Insulin decreases blood glucose, while glucagon increases it.

Question 19

A person with a BMI of 42 is at increased risk for which of the following conditions, based on epidemiological data?

Accepted Answer

Type 2 diabetes mellitus

Question 20

Which of the following is a real-life consequence of untreated diabetes mellitus on kidney function?

Accepted Answer

Increased urine output due to high glucose in the filtrate

Animal Nutrition: Structure, Function, and Homeostasis

Study Guide - Practice Questions