Question 1

Which of the following is a primary advantage of a four-chambered heart in birds and mammals compared to the three-chambered heart of reptiles?

Accepted Answer

It allows for complete separation of oxygenated and deoxygenated blood, maximizing efficiency of oxygen delivery.

Question 2

In the context of gas exchange, why is countercurrent exchange in fish gills more efficient than concurrent exchange?

Accepted Answer

Countercurrent exchange maintains a gradient for O2 diffusion along the entire length of the gill, maximizing O2 uptake.

Question 3

Which equation best represents Boyle’s Law as it applies to mammalian ventilation?

Accepted Answer

$$P \propto \frac{1}{V}$$

Question 4

What is the main function of villi and microvilli in the small intestine?

Accepted Answer

To increase surface area for absorption of nutrients.

Question 5

Which feeding mechanism is used by whales to capture small organisms suspended in water?

Accepted Answer

Suspension feeding

Question 6

Why do herbivores typically have a larger cecum compared to carnivores?

Accepted Answer

To provide space for symbiotic microorganisms that help digest cellulose.

Question 7

Which of the following is a product of protein metabolism that must be removed from the body due to its toxicity?

Accepted Answer

Ammonia

Question 8

What is the primary role of hemoglobin in vertebrate blood?

Accepted Answer

To bind and transport oxygen from the lungs to tissues.

Question 9

Which process is responsible for the movement of gases across respiratory surfaces?

Accepted Answer

Diffusion

Question 10

Which equation describes the conversion of CO2 in the blood, catalyzed by carbonic anhydrase?

Accepted Answer

$$\mathrm{H_2O} + \mathrm{CO_2$} \rightarrow \mathrm{H_2CO_3}$$

Question 11

Which animal group relies primarily on cutaneous respiration, and under what conditions is this most effective?

Accepted Answer

Amphibians; in aquatic or moist terrestrial habitats

Question 12

What is the main advantage of double circulation in amphibians and reptiles compared to the single circulation in fish?

Accepted Answer

It allows for higher blood pressure in systemic circulation, improving delivery of nutrients and oxygen.

Question 13

Which of the following is NOT a function of the alimentary canal?

Accepted Answer

Production of nitrogenous waste

Question 14

Which enzyme is responsible for breaking down starch (amylose) into maltose?

Accepted Answer

Amylase

Question 15

Why is lactic acid fermentation used by animal cells under certain conditions?

Accepted Answer

To generate ATP when oxygen is unavailable

Question 16

Which structure in the vertebrate kidney is responsible for filtration of blood plasma?

Accepted Answer

Glomerulus

Question 17

What is the primary function of Malpighian tubules in insects?

Accepted Answer

Removal of nitrogenous waste and regulation of water balance

Question 18

Which feeding strategy is used by mosquitoes?

Accepted Answer

Fluid feeding

Question 19

Which of the following is a real-world example of coprophagy, and why is it important for some herbivores?

Accepted Answer

Rabbits re-ingesting their feces to maximize nutrient absorption from cellulose-digesting microorganisms

Question 20

Which equation best describes the partial pressure of oxygen in air?

Accepted Answer

$$P_{O_2$} = 0.2095 	imes 760 	ext{ mmHg} = 160 	ext{ mmHg}$$

Topic 4 - Animal Needs

Study Guide - Practice Questions