The Cardiovascular System: True Or False

Front 1

The heart is located approximately between the second and fifth ribs and "posterior" to the vertebral column.

Back 1

False, anterior

Front 2

The pericardium is a double sac membrane in which the outer membrane is the "visceral" pericardium.

Back 2

False, parietal

Front 3

The major constituent of the heart is a layer of cardiac muscle known as the "endocardium."

Back 3

False, myocardium

Front 4

The two inferior chambers of the heart are known as the "atria."

Back 4

False, ventricles

Front 5

Blood returns from the body through the superior and inferior vena cavae, which empty into the "left" atrium.

Back 5

False, right atrium

Front 6

Blood returning from the heart muscle enters the "ventricular" sinus.

Back 6

False, coronary

Front 7

Blood moves toward the lungs after it leaves the "right" ventricle.

Back 7

True

Front 8

The aorta, the largest artery of the body, receives blood from the "right" ventricle.

Back 8

False, left

Front 9

The "tricuspid" valve lies between the left atrium and the left ventricle.

Back 9

False, bicuspid (mitral)

Front 10

The valves found at the entrance to the pulmonary artery and the aorta are known as "semilunar."

Back 10

True

Front 11

The atrioventricular valves prevent blood from flowing backward into the "ventricles."

Back 11

False, atria

Front 12

Dying cells in the heart muscle may form a blockage known as a "coronary thrombosis."

Back 12

False, myocardial infarction

Front 13

Impulses for the contraction of heart muscle are generated initially at the atrioventricular node.

Back 13

False, sinoatrial

Front 14

Fibers known as "Purkinje" fibers spread out from the AV node and carry impulses to the ventricles.

Back 14

True

Front 15

Some nerve control over the heart can be exerted by fibers of the "autonomic" nervous system

Back 15

True

Front 16

The condition in which the heart contracts rapidly and irregularly is known as "arrhythmia."

Back 16

False, fibrillation

Front 17

The relaxation period between heart contractions is correctly known as "systole."

Back 17

False, diastole

Front 18

The heart beats approximately 70-75 times each "second."

Back 18

False, minute

Front 19

A heart murmur is generally due to unusual heart sounds arising from improper activity of the heart "muscle."

Back 19

False, valves

Front 20

The smallest heart vessels in the body are known as "venules."

Back 20

False, capillaries

Front 21

The narrowing of the lumen of the artery is known as "vasodilation."

Back 21

False, vasoconstriction

Front 22

The condition of varicose veins is generally due to improper activity of the vein "sphincters."

Back 22

False, valves

Front 23

A pulse rate that is more rapid than normal reflects a condition called "tachycardia."

Back 23

False, true

Front 24

The carotid bodies and aortic bodies contain neurons called "baroreceptors" that help regulate the blood flow.

Back 24

False, chemoreceptors

Front 25

The only artery that carries carbon dioxide-rich blood is the "pulmonary" artery.

Back 25

True