Question 1

Which of the following best describes the function of the right side of the heart?

Accepted Answer

It pumps deoxygenated blood to the lungs through the pulmonary circuit.

Question 2

Which chamber of the heart receives oxygenated blood from the pulmonary veins?

Accepted Answer

Left atrium

Question 3

The pericardial cavity is located:

Accepted Answer

Between the visceral and parietal layers of the serous pericardium

Question 4

What is the primary function of pericardial fluid?

Accepted Answer

To reduce friction between the heart and surrounding structures during contraction

Question 5

Which valve prevents backflow of blood from the left ventricle to the left atrium?

Accepted Answer

Mitral (bicuspid) valve

Question 6

During the cardiac cycle, which event occurs immediately after the ventricles contract?

Accepted Answer

The semilunar valves open, allowing blood to flow into the arteries

Question 7

Which of the following best explains why the left side of the heart is called the systemic pump?

Accepted Answer

It pumps oxygenated blood to all tissues of the body except the lungs

Question 8

Which hormone is produced by the atria of the heart and helps lower blood pressure?

Accepted Answer

Atrial natriuretic peptide (ANP)

Question 9

A buildup of fatty material in the coronary arteries can lead to which condition, often resulting in myocardial infarction?

Accepted Answer

Coronary artery disease (CAD)

Question 10

Which of the following is a property of cardiac muscle cells that allows them to set their own rhythm without nervous system input?

Accepted Answer

Autorhythmicity

Question 11

The fastest intrinsic rate of depolarization in the heart is found in which structure?

Accepted Answer

Sinoatrial (SA) node

Question 12

Which of the following equations correctly calculates cardiac output ($$CO$$)?

Accepted Answer

$$CO = HR 	imes SV$$

Question 13

If a patient’s stroke volume ($$SV) is$$ $$70\,mL$$ and heart rate ($$HR) is$$ $$80\,beats/min$$, what is their cardiac output ($$CO$$)?

Accepted Answer

$$CO = 5600\,mL/min$$

Question 14

Which of the following best describes the role of the fibrous skeleton of the heart?

Accepted Answer

It provides structural support, insulates electrical impulses, and anchors heart valves

Question 15

Which of the following is true regarding the coronary circulation?

Accepted Answer

It supplies oxygen and nutrients to the myocardium

Question 16

During the pacemaker cell action potential, which phase is characterized by the opening of voltage-gated calcium channels?

Accepted Answer

Full depolarization phase

Question 17

Which of the following best explains how ANP (atrial natriuretic peptide) lowers blood pressure?

Accepted Answer

By promoting sodium and water excretion, reducing blood volume

Question 18

Which of the following is a symptom of myocardial infarction (MI)?

Accepted Answer

Sudden onset of chest pain radiating to the left arm

Question 19

Which of the following statements about the cardiac conduction system is correct?

Accepted Answer

The Purkinje fibers depolarize at about 20 times per minute

Question 20

Which of the following best describes the function of the auricles of the atria?

Accepted Answer

They increase the volume capacity of the atria

Anatomy and Physiology of the Heart: Structure, Function, and Electrophysiology

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