Question 1

Which system is primarily activated to help mitigate blood pressure changes due to fluid loss from severe vomiting?

Accepted Answer

The renin-angiotensin-aldosterone system (RAAS)

Question 2

What is the main difference between arteries and arterioles in terms of blood vessel structure and function?

Accepted Answer

Arteries transport blood at higher pressure and have thicker walls than arterioles

Question 3

If a patient has polycythemia (increased red blood cell count), how would this affect blood viscosity and blood pressure?

Accepted Answer

Blood viscosity would increase, raising blood pressure

Question 4

Which of the following best describes the function of the blood-brain barrier?

Accepted Answer

It selectively restricts the movement of certain substances from the blood into the brain

Question 5

How does a decrease in venous blood volume affect preload in the heart?

Accepted Answer

Preload decreases due to lower venous return

Question 6

A patient suffers a stroke that damages the cardiac center in the medulla oblongata. Which of the following is most likely to occur?

Accepted Answer

Decreased heart rate and irregular cardiac rhythm

Question 7

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

Accepted Answer

$$CO = SV 	imes HR$$

Question 8

During exercise, which vessel type experiences the largest drop in blood pressure?

Accepted Answer

Arterioles

Question 9

In the cardiac conduction system, where does the pacemaker impulse originate?

Accepted Answer

Sinoatrial (SA) node

Question 10

Which wave on an ECG corresponds to ventricular depolarization?

Accepted Answer

QRS complex

Question 11

Which of the following factors would most likely increase blood pressure?

Accepted Answer

Increased sympathetic activity (e.g., during running)

Question 12

What is the dominant Starling force at the arteriole end of a capillary?

Accepted Answer

Capillary hydrostatic pressure

Question 13

If a person quickly moves from sitting to standing, how does the baroreceptor reflex respond to stabilize blood pressure?

Accepted Answer

It increases heart rate and vasoconstricts blood vessels

Question 14

Which process is primarily responsible for absorption in capillary exchange?

Accepted Answer

Osmosis due to plasma proteins

Question 15

During isovolumetric relaxation in the cardiac cycle, which of the following occurs?

Accepted Answer

Ventricular pressure falls, but no blood enters or leaves the ventricles

Question 16

A patient with chronic diarrhea is at risk for which of the following changes in blood volume and pressure?

Accepted Answer

Decreased blood volume and decreased blood pressure

Question 17

Which of the following best explains why capillaries are the primary site of nutrient and gas exchange?

Accepted Answer

They have thin walls and slow blood flow

Question 18

Which of the following would most likely decrease stroke volume ($$SV$$)?

Accepted Answer

Decreased preload

Question 19

If a patient has a blockage in the left anterior descending coronary artery, which cardiac function is most likely to be impaired?

Accepted Answer

Oxygen delivery to the left ventricle

Question 20

Which of the following is a direct effect of increased afterload on the heart?

Accepted Answer

Decreased cardiac output

Cardiovascular System: Blood Vessels, Blood Flow, and Blood Pressure (Chapter 14) Study Guide

Study Guide - Practice Questions