Question 1

Which of the following best describes the sequence of oxygen movement from the environment to the mitochondria in a mammalian cell, as illustrated in the first image?

Accepted Answer

Ventilation → Circulation → Respiration

Question 2

The barge shown in the second image is most analogous to which component of the circulatory system?

Accepted Answer

Veins, because they carry blood back to the heart at low pressure

Question 3

The traffic officer in the third image is most analogous to which structure in the mammalian heart?

Accepted Answer

Atrioventricular (AV) valves, because they regulate the direction of blood flow between chambers

Question 4

The animal in the fourth image is most likely to have which type of circulatory system?

Accepted Answer

Closed circulatory system with a three-chambered heart

Question 5

Based on the fifth image, which of the following statements about spider circulation is correct?

Accepted Answer

Spiders have an open circulatory system where hemolymph bathes tissues directly

Question 6

The animal in the sixth image is an example of which type of circulatory system?

Accepted Answer

Open circulatory system

Question 7

The animal in the seventh image (a squid) is an example of which type of circulatory system?

Accepted Answer

Closed circulatory system

Question 8

The eighth image shows a cross-section of a blood vessel. Which layer is labeled 'TM' and what is its function?

Accepted Answer

Tunica media; it contains smooth muscle that regulates vessel diameter

Question 9

The ninth image shows a capillary. What is the primary function of capillaries in the circulatory system?

Accepted Answer

Exchange of gases, nutrients, and wastes between blood and tissues

Question 10

The tenth image is a histological section of a blood vessel. Which type of vessel is this most likely to be, and why?

Accepted Answer

Artery, because it has a thick tunica media

Question 11

The twelfth image shows a network of vessels. What is the physiological significance of the transition from red to blue in this diagram?

Accepted Answer

It represents the exchange of oxygen and carbon dioxide in the capillaries

Question 12

The thirteenth image shows the circulatory system of a fish. Which statement best describes the flow of blood in this system?

Accepted Answer

Blood passes through two capillary beds before returning to the heart

Question 13

The fourteenth image shows the heart of an amphibian. What is a key feature of the amphibian heart?

Accepted Answer

It has three chambers, leading to some mixing of oxygenated and deoxygenated blood

Question 14

The sixteenth image shows the circulatory system of a reptile (except birds). What is a distinguishing feature of this system?

Accepted Answer

It has an incomplete septum in the ventricle, allowing some mixing of blood

Question 15

The nineteenth image shows a mammalian heart. Which side of the heart pumps oxygenated blood to the body?

Accepted Answer

Left side

Question 16

The twenty-first image shows a pressure graph during the cardiac cycle. What does the peak in the purple line represent?

Accepted Answer

Systolic blood pressure during ventricular contraction

Circulation and Gas Exchange: Structure, Function, and Evolution of Cardiovascular and Respiratory Systems

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