$$\text{C}_6\text{H}_{12}\text{O}_6 + 6\text{O}_2 \rightarrow 6\text{CO}_2 + 6\text{H}_2\text{O} + \text{ATP}$$

$$\text{Peptide} + \text{H}_2\text{O} \rightarrow \text{Amino acid}_1 + \text{Amino acid}_2$$

Question 1

Which of the following best describes the difference in alimentary canal length between herbivores and carnivores, and why?

Accepted Answer

Herbivores have longer alimentary canals because plant material requires more time and specialized compartments for digestion.

Question 2

A person who consumes only corn as their staple food is at risk for which nutritional deficiency, and why?

Accepted Answer

Protein deficiency, because corn is low in essential amino acids like lysine and tryptophan.

Question 3

Which of the following is NOT an essential nutrient for humans?

Accepted Answer

Glutamine

Question 4

Which equation best represents the conversion of chemical energy from food into usable energy in animal cells?

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 5

Which feeding mechanism is used by humpback whales, and what is its primary advantage?

Accepted Answer

Suspension feeding; enables efficient collection of small food particles from water.

Question 6

Which of the following statements about vitamins is correct?

Accepted Answer

Water-soluble vitamins include vitamin C and the B group, and excess amounts are excreted in urine.

Question 7

A child presents with swollen belly, thin limbs, and hair changes. Which dietary deficiency is most likely responsible?

Accepted Answer

Protein deficiency (Kwashiorkor)

Question 8

Which process involves the breakdown of food particles outside of cells in a compartment continuous with the animal’s body exterior?

Accepted Answer

Extracellular digestion

Question 9

Which enzyme is secreted in the oral cavity and initiates the breakdown of carbohydrates?

Accepted Answer

Salivary amylase

Question 10

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

Accepted Answer

Emulsifies fats to increase surface area for enzymatic digestion

Question 11

Which hormone is produced by fat cells and acts as an appetite suppressant?

Accepted Answer

Leptin

Question 12

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

Accepted Answer

It carries absorbed amino acids and sugars from the small intestine to the liver for processing.

Question 13

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

Accepted Answer

Ingestion, digestion, absorption, elimination

Question 14

Which structure in the small intestine is responsible for increasing surface area to maximize nutrient absorption?

Accepted Answer

Villi and microvilli

Question 15

Which of the following is a real-life example of a 'complete protein' source for humans?

Accepted Answer

Eggs

Question 16

Which equation represents the enzymatic hydrolysis of a peptide bond during protein digestion?

Accepted Answer

$$	ext{Peptide} + 	ext{H}_2	ext{O} ightarrow 	ext{Amino acid}_1 + 	ext{Amino acid}_2$$

Question 17

Which of the following is a plausible consequence of undernourishment in animals?

Accepted Answer

Breakdown of stored fat and carbohydrates, followed by breakdown of proteins

Question 18

Which digestive compartment is found in animals with simple body plans and functions in both digestion and distribution of nutrients?

Accepted Answer

Gastrovascular cavity

Question 19

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

Accepted Answer

Fats are recombined into chylomicrons and transported into lacteals.

Question 20

Which adaptation is most likely found in ruminants to aid in the digestion of cellulose?

Accepted Answer

Fermentation chambers containing symbiotic microorganisms

Animal Nutrition and Digestive Systems: Essential Concepts and Mechanisms

Study Guide - Practice Questions