FREE NEX Anatomy and Physiology: The Cardiovascular System Questions and Answers

Question 1

Which chamber of the heart is the first to receive deoxygenated blood returning from the body?

Accepted Answer

Right atrium

Answer

Left atrium

Answer

Left ventricle

Answer

Right ventricle

Question 2

What is considered the natural pacemaker of the heart, responsible for initiating the cardiac cycle?

Accepted Answer

Sinoatrial (SA) node

Answer

Atrioventricular (AV) node

Answer

Bundle of His

Answer

Purkinje fibers

Question 3

Which of the following best describes the primary function of the heart valves?

Accepted Answer

To prevent the backflow of blood

Answer

To oxygenate the blood

Answer

To generate electrical impulses

Answer

To filter impurities from the blood

Question 4

Which statement accurately distinguishes arteries from veins?

Accepted Answer

Arteries carry blood away from the heart.

Answer

Arteries always carry deoxygenated blood.

Answer

Veins have thicker, more muscular walls than arteries.

Answer

Veins are the site of gas exchange with tissues.

Question 5

The protein found in red blood cells that is responsible for transporting oxygen is called:

Accepted Answer

Hemoglobin

Answer

Albumin

Answer

Fibrinogen

Answer

Myoglobin

Question 6

Blood leaving the left ventricle is pumped into which major blood vessel?

Accepted Answer

Aorta

Answer

Pulmonary artery

Answer

Superior vena cava

Answer

Pulmonary vein