Question 1

Which layer of the heart is responsible for the muscular contractions that pump blood throughout the body?

Accepted Answer

Myocardium

Question 2

During ventricular systole, which valves are open and which are closed?

Accepted Answer

Semilunar valves open, AV valves closed

Question 3

A patient has a blockage in the right coronary artery. Which of the following is a likely consequence?

Accepted Answer

Angina pectoris or myocardial infarction in regions supplied by the right coronary artery

Question 4

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

Accepted Answer

Prevent backflow of blood into the atria during ventricular contraction

Question 5

Which formula correctly represents the relationship between blood pressure, cardiac output, and peripheral resistance?

Accepted Answer

$BP = CO 	imes PR$

Question 6

A patient’s blood pressure is measured as 120/80 mmHg. What does the 80 mmHg value represent?

Accepted Answer

Diastolic pressure during ventricular relaxation

Question 7

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

Accepted Answer

Synthesizes red blood cells

Question 8

Which blood vessel layer is primarily responsible for vasoconstriction and vasodilation?

Accepted Answer

Tunica media

Question 9

Which of the following best explains why veins have valves?

Accepted Answer

To prevent blood from flowing backward due to low pressure

Question 10

Which cell type is responsible for producing antibodies in the lymphatic system?

Accepted Answer

B cells

Question 11

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 12

Which of the following best describes the function of erythropoietin (EPO)?

Accepted Answer

Stimulates red blood cell production in the bone marrow

Question 13

A patient is experiencing edema due to blocked lymphatic vessels. Which process is most directly impaired?

Accepted Answer

Return of excess interstitial fluid to the bloodstream

Question 14

Which of the following is a function of the spleen?

Accepted Answer

Filters blood, removes old RBCs, stores platelets, and activates immune cells

Question 15

Which of the following correctly describes the role of capillaries in the circulatory system?

Accepted Answer

They are the site of nutrient, gas, and waste exchange between blood and tissues

Question 16

Which formula best represents the calculation of cardiac output?

Accepted Answer

$CO = HR 	imes SV$

Question 17

Which of the following is a direct effect of increased blood viscosity?

Accepted Answer

Increased resistance and decreased blood flow

Question 18

Which of the following best describes the function of platelets?

Accepted Answer

Initiate clotting by forming a platelet plug

Question 19

Which of the following is true regarding the pulmonary circuit?

Accepted Answer

It carries deoxygenated blood from the right ventricle to the lungs

Question 20

Which of the following is a function of Mucosa-associated lymphoid tissue (MALT)?

Accepted Answer

Protects mucous membranes from pathogens

Cardiovascular, Blood, and Lymphatic Systems: Study Notes (Chapters 17, 18, 19, 20)

Study Guide - Practice Questions