Question 1

Which of the following best describes the primary function of erythrocytes in human blood?

Accepted Answer

To transport oxygen from the lungs to body tissues

Question 2

A patient presents with a deficiency in platelets. Which physiological process would be most directly affected?

Accepted Answer

Blood clotting

Question 3

Which of the following equations correctly represents cardiac output ($$CO) in $$terms of heart rate ($$HR) $$and stroke volume ($$SV$$)?

Accepted Answer

$$CO = HR 	imes SV$$

Question 4

During intense exercise, which change occurs in the distribution of blood flow?

Accepted Answer

Increased flow to skeletal muscles

Question 5

Which structure in the heart prevents the backflow of blood from the ventricles to the atria during ventricular contraction?

Accepted Answer

Atrioventricular (AV) valves

Question 6

A patient has a mutation affecting the hemoglobin molecule. Which function is most likely impaired?

Accepted Answer

Transport of oxygen from lungs to tissues

Question 7

Which of the following best explains why the left ventricle has a thicker wall than the right ventricle?

Accepted Answer

It pumps blood to the entire body, requiring higher pressure

Question 8

Which of the following is the correct sequence of electrical conduction in the heart?

Accepted Answer

SA node → AV node → Bundle of His → Purkinje fibers

Question 9

Which formula correctly calculates mean arterial pressure ($$MAP) $$using cardiac output ($$CO) $$and total peripheral resistance ($$TPR$$)?

Accepted Answer

$$MAP = CO 	imes TPR$$

Question 10

A patient is diagnosed with anemia. Which of the following laboratory findings would you expect?

Accepted Answer

Decreased hemoglobin concentration

Question 11

Which of the following best describes the role of the lymphatic system in cardiovascular physiology?

Accepted Answer

It returns excess interstitial fluid to the bloodstream

Question 12

Which of the following is a correct description of the Frank-Starling law of the heart?

Accepted Answer

The greater the stretch of cardiac muscle fibers, the stronger the contraction

Question 13

A patient with a blocked coronary artery is at risk for which of the following conditions?

Accepted Answer

Myocardial infarction

Question 14

Which of the following best explains the function of the chordae tendineae in the heart?

Accepted Answer

They prevent the AV valves from inverting into the atria during ventricular contraction

Question 15

Which of the following equations correctly represents the relationship between blood flow ($$F$$), pressure difference ($$\Delta P$$), and resistance ($$R$$)?

Accepted Answer

$$F = \Delta P \div R$$

Question 16

A patient is experiencing tachycardia. Which of the following best describes this condition?

Accepted Answer

Abnormally fast heart rate

Question 17

Which of the following is the main function of leukocytes in the blood?

Accepted Answer

Defend against infection

Question 18

Which of the following best describes the role of the sinoatrial (SA) node?

Accepted Answer

It initiates the electrical impulse that sets the pace of the heartbeat

Question 19

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

Accepted Answer

Left ventricular hypertrophy

Question 20

Which of the following mechanisms is primarily responsible for the regulation of blood pressure in the short term?

Accepted Answer

Baroreceptor reflexes

Anatomy & Physiology: Cardiovascular System Study Guide

Study Guide - Practice Questions

Study Guide - Flashcards