Question 1

Which of the following best describes the primary function of red blood cells (RBCs) in human blood?

Accepted Answer

To transport oxygen from the lungs to body tissues

Question 2

A patient with sickle-cell anemia experiences a crisis episode. Which structural characteristic of hemoglobin is most directly responsible for the sickling of RBCs?

Accepted Answer

A mutation causing the substitution of valine for glutamic acid in the beta chain

Question 3

Which organ is primarily responsible for regulating the production of red blood cells (erythropoiesis)?

Accepted Answer

Kidney

Question 4

If a person has blood type AB, which antigens are present on their red blood cells?

Accepted Answer

Both A and B antigens

Question 5

During the cardiac cycle, which valves are open during ventricular systole?

Accepted Answer

Semilunar valves

Question 6

Which of the following best explains why the left ventricular wall is thicker than the right?

Accepted Answer

It pumps blood to the entire body, requiring higher pressure

Question 7

A patient is diagnosed with a myocardial infarction. Which of the following best describes the underlying cause?

Accepted Answer

Permanent damage due to blocked coronary artery

Question 8

Which formula correctly calculates cardiac output ($$CO) $$given heart rate ($$HR) $$and stroke volume ($$SV$$)?

Accepted Answer

$$CO = HR 	imes SV$$

Question 9

Which of the following is NOT a factor that increases heart rate?

Accepted Answer

Parasympathetic nervous system activation

Question 10

Which vessel type is primarily responsible for the exchange of nutrients and gases between blood and tissues?

Accepted Answer

Capillaries

Question 11

Which of the following best describes the function of baroreceptors in the cardiovascular system?

Accepted Answer

Monitor blood pressure and initiate reflexes to maintain homeostasis

Question 12

Bulk flow in capillaries is regulated by which two main pressures?

Accepted Answer

Hydrostatic pressure and osmotic pressure

Question 13

Which hormone listed below increases blood pressure by causing vasoconstriction?

Accepted Answer

Antidiuretic hormone (ADH)

Question 14

Which of the following is the correct formula for calculating mean arterial pressure ($$MAP$$)?

Accepted Answer

$$MAP = \frac{1}{3} (Systolic) + \frac{2}{3} (Diastolic)$$

Question 15

A patient has a blood pressure of 120/80 mmHg and a heart rate of 75 bpm. What is their pulse pressure?

Accepted Answer

$$Pulse\ Pressure = 120 - 80 = 40\ mmHg$$

Question 16

Which of the following is the most significant source of blood flow resistance in the circulatory system?

Accepted Answer

Vessel diameter

Question 17

Which of the following arteries is classified as a muscular artery and is responsible for distributing blood to specific organs?

Accepted Answer

Femoral artery

Question 18

Which of the following best describes tissue perfusion?

Accepted Answer

The delivery of blood to a capillary bed in tissue

Question 19

A patient with severe dehydration has increased blood viscosity. What effect will this have on blood flow resistance?

Accepted Answer

It will increase resistance

Question 20

Which of the following is NOT a factor that influences tissue perfusion?

Accepted Answer

Bone density

Cardiovascular System: Blood, Heart, and Vessels Study Guide

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