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

$$MAP = \text{Diastolic Pressure} + \frac{1}{3} (\text{Systolic Pressure} - \text{Diastolic Pressure})$$

Question 1

Which of the following best describes the primary function of the cardiovascular system?

Accepted Answer

To transport nutrients, gases, and wastes throughout the body

Question 2

What is the correct sequence of blood flow through the heart, starting from the right atrium?

Accepted Answer

Right atrium → Right ventricle → Pulmonary artery → Lungs → Left atrium → Left ventricle → Aorta

Question 3

Which equation correctly relates flow ($$Q$$), pressure difference ($$\Delta P$$), and resistance ($$R) in $$the cardiovascular system?

Accepted Answer

$$Q = \frac{\Delta P}{R}$$

Question 4

Which vessel type has the greatest total cross-sectional area and is the primary site of exchange between blood and tissues?

Accepted Answer

Capillaries

Question 5

During vasoconstriction, what happens to blood flow through a vessel if all other factors remain constant?

Accepted Answer

Blood flow decreases due to increased resistance

Question 6

Which of the following best explains the difference between pulmonary and systemic circulation?

Accepted Answer

Pulmonary circulation moves blood between the heart and lungs, while systemic circulation moves blood between the heart and the rest of the body

Question 7

Which of the following factors would most likely increase stroke volume?

Accepted Answer

Increased preload

Question 8

Which statement best describes the role of the sinoatrial (SA) node in the heart?

Accepted Answer

It initiates electrical impulses that set the pace for the heart rate

Question 9

Which of the following is a correct description of the QRS complex in an electrocardiogram (ECG)?

Accepted Answer

It represents ventricular depolarization

Question 10

If the end-diastolic volume (EDV) is 120 mL and the end-systolic volume (ESV) is 50 mL, what is the stroke volume (SV)? Use the formula $$SV = EDV - ESV.$$

Accepted Answer

$$SV = 70 	ext{ mL}$$

Question 11

Which of the following is a major difference between arteries and veins?

Accepted Answer

Arteries have thicker walls and higher pressure than veins

Question 12

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

Accepted Answer

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

Question 13

Which of the following is NOT a function of the lymphatic system?

Accepted Answer

Transporting oxygen to tissues

Question 14

Which of the following changes would most likely decrease blood pressure?

Accepted Answer

Decrease in cardiac output

Question 15

Which of the following best describes the role of pericytes in capillaries?

Accepted Answer

They regulate capillary blood flow and support vessel stability

Question 16

Which of the following factors would most likely increase resistance to blood flow in a vessel?

Accepted Answer

Increasing blood viscosity

Question 17

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

Accepted Answer

$$MAP = 	ext{Diastolic Pressure} + \frac{1}{3} (	ext{Systolic Pressure} - 	ext{Diastolic Pressure})$$

Question 18

Which of the following best describes the function of the atrioventricular (AV) node?

Accepted Answer

It delays the electrical signal to allow the atria to contract before the ventricles

Question 19

Which of the following would most likely result from a blockage in the coronary arteries?

Accepted Answer

Reduced oxygen supply to the heart muscle

Question 20

Which of the following best explains why capillaries are ideal for exchange of materials between blood and tissues?

Accepted Answer

They have thin walls and a large total cross-sectional area

Cardiovascular System: Structure, Function, and Physiology

Study Guide - Practice Questions

Study Guide - Flashcards