Question 1

Which of the following best describes the difference between the pulmonary and systemic circuits of the heart?

Accepted Answer

The pulmonary circuit carries deoxygenated blood from the right ventricle to the lungs and returns oxygenated blood to the left atrium, while the systemic circuit carries oxygenated blood from the left ventricle to the body and returns deoxygenated blood to the right atrium.

Question 2

A patient has a blockage in the left atrioventricular (bicuspid) valve. Which of the following would most likely occur as a result?

Accepted Answer

Blood would back up into the left atrium and pulmonary veins, potentially leading to pulmonary congestion.

Question 3

Which of the following best describes the function of the intercalated discs in cardiac muscle?

Accepted Answer

They allow for rapid transmission of action potentials and mechanical connection between cardiac cells.

Question 4

During the cardiac cycle, which event is responsible for the first heart sound (S1)?

Accepted Answer

Closure of the atrioventricular valves

Question 5

A patient is experiencing bradycardia due to a malfunction in the heart's pacemaker. Which structure is most likely affected?

Accepted Answer

Sinoatrial (SA) node

Question 6

Which equation correctly represents cardiac output ($$CO) $$and its components?

Accepted Answer

$$CO = HR 	imes SV$$

Question 7

A sudden increase in afterload will have which of the following effects on stroke volume, assuming all other factors remain constant?

Accepted Answer

Stroke volume will decrease because the ventricle must work harder to overcome the increased resistance.

Question 8

Which of the following best describes the role of the sympathetic nervous system in regulating heart function?

Accepted Answer

It increases heart rate and contractility by releasing norepinephrine.

Question 9

A patient with a mutation that impairs the function of cardiac muscle pacemaker cells would most likely experience which of the following?

Accepted Answer

Irregular heart rhythms (arrhythmias)

Question 10

Which of the following best explains the Frank-Starling law of the heart?

Accepted Answer

The greater the end-diastolic volume, the greater the force of contraction, up to a physiological limit.

Question 11

A patient is found to have a blood pressure of 140/90 mmHg. What is their pulse pressure?

Accepted Answer

$$50\ 	ext{mmHg}$$

Question 12

Which of the following is a correct sequence of blood flow through the systemic circuit?

Accepted Answer

Left ventricle $$\rightarrow$$ aorta $$\rightarrow$$ arteries $$\rightarrow$$ arterioles $$\rightarrow$$ capillaries $$\rightarrow$$ venules $$\rightarrow$$ veins $$\rightarrow$$ right atrium

Question 13

Which of the following best describes the difference between arteries and veins?

Accepted Answer

Veins have valves to prevent backflow, while arteries do not.

Question 14

Which of the following factors would most likely increase blood flow through a vessel, according to Poiseuille's law?

Accepted Answer

Decreasing blood viscosity

Question 15

A patient is experiencing vasoconstriction in their arterioles. What effect will this have on blood pressure and blood flow?

Accepted Answer

Blood pressure will increase and blood flow to downstream tissues will decrease.

Question 16

Which of the following best describes the function of baroreceptors in blood pressure regulation?

Accepted Answer

They sense changes in blood pressure and send signals to the cardiovascular center to adjust heart rate and vessel diameter.

Question 17

Which of the following is true regarding capillaries?

Accepted Answer

They are the primary site of nutrient and gas exchange between blood and tissues.

Question 18

A patient with chronic hypertension is at risk for which of the following complications due to increased afterload?

Accepted Answer

Left ventricular hypertrophy

Question 19

Which of the following best explains why veins have a larger lumen and thinner walls compared to arteries?

Accepted Answer

Veins carry blood at lower pressure and serve as blood reservoirs.

Question 20

Which of the following would most likely occur if the left ventricle fails to pump effectively?

Accepted Answer

Pulmonary edema due to blood backing up in the pulmonary circulation

Study Guide: The Heart and Blood Vessels (Anatomy & Physiology)

Study Guide - Practice Questions

Study Guide - Flashcards