Question 1

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

Accepted Answer

They transport oxygen from the lungs to tissues and facilitate carbon dioxide removal.

Question 2

A patient with a mutation that prevents the production of erythropoietin (EPO) would most likely experience which of the following?

Accepted Answer

Decreased red blood cell count and anemia

Question 3

Which of the following equations correctly represents cardiac output (CO)?

Accepted Answer

$CO = HR 	imes SV$

Question 4

A patient receives a transfusion of type A blood but is type B. What is the most likely immediate consequence?

Accepted Answer

Hemolytic transfusion reaction due to anti-A antibodies attacking donor erythrocytes.

Question 5

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

Accepted Answer

The greater the end-diastolic volume (EDV), the greater the force of contraction and stroke volume.

Question 6

During the cardiac cycle, which event immediately follows the closure of the atrioventricular (AV) valves?

Accepted Answer

Isovolumetric contraction

Question 7

Which of the following would most likely increase peripheral resistance and thus raise blood pressure?

Accepted Answer

Increased length of blood vessels

Question 8

A patient with liver failure is at increased risk for excessive bleeding primarily because:

Accepted Answer

The liver produces most of the plasma proteins involved in clotting.

Question 9

Which of the following best describes the role of calcium ions ($Ca^{2+}$) in cardiac muscle contraction?

Accepted Answer

They bind to troponin, allowing actin-myosin cross-bridge formation.

Question 10

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 11

A patient with a high mean arterial pressure (MAP) is at risk for which of the following complications?

Accepted Answer

Increased risk of vascular damage and stroke

Question 12

Which of the following best describes the function of the hepatic portal system?

Accepted Answer

It transports nutrient-rich blood from the digestive tract to the liver for processing.

Question 13

Which of the following would most likely occur if the baroreceptor reflex is inhibited?

Accepted Answer

Blood pressure would become more variable and less regulated.

Question 14

Which of the following is a correct statement about the structure of capillaries?

Accepted Answer

They consist of a single layer of endothelial cells to facilitate exchange.

Question 15

A patient with a deficiency in vitamin K would most likely experience which of the following?

Accepted Answer

Impaired blood clotting and increased bleeding tendency

Question 16

Which of the following best explains why veins are considered blood reservoirs?

Accepted Answer

They contain the majority of the body's blood volume due to their high compliance.

Question 17

Which of the following would most likely result from left ventricular failure?

Accepted Answer

Pulmonary edema due to increased pressure in the pulmonary circulation

Question 18

Which of the following best describes the function of the SA node in the heart?

Accepted Answer

It acts as the primary pacemaker, initiating the heartbeat.

Question 19

Which of the following changes would most likely increase stroke volume (SV)?

Accepted Answer

Increased end-diastolic volume (EDV)

Question 20

Which of the following best describes the process of fibrinolysis?

Accepted Answer

Breakdown and removal of a blood clot by plasmin

Study Guide: Blood, Heart, and Blood Vessels in Human Anatomy & Physiology

Study Guide - Practice Questions