Chapter 18 Practice Test

Using the pull-down menus, match each item in the left column to the corresponding item in the right column. 14.1 Cardiac cycle 14.2 Systole 14.3 Diastole 14.4 Stroke Volume 14.5 Cardiac output

14.1 The events associated with blood flow through the heart during one complete heartbeat 14.2 Contraction 14.3 Relaxation 14.4 The volume of blood pumped by one ventricle with each heartbeat 14.5 The amount of blood pumped by each ventricle in one minute

Using the pull-down menus, match each item in the left column to the corresponding item in the right column. 6.1 Right marginal artery 6.2 Posterior interventricular artery 6.3 Anterior interventricular artery 6.4 Circumflex artery

6.1 Supplies blood to the right side of the myocardium 6.2 Runs to the apex of the heart 6.3 Supplies blood to the interventricular septum and anterior walls of both ventricles 6.4 Supplies blood to the left atrium and posterior walls of the left ventricle

Using the pull-down menus, match each item in the left column to the corresponding item in the right column. 8.1 Tricuspid valve 8.2 Mitral valve 8.3 Aortic semilunar valve 8.4 Pulmonary semilunar valve

8.1 Valve between the right atrium and right ventricle 8.2 Valve between the left atrium and left ventricle 8.3 Gatekeeper to systemic circuit 8.4 Prevents backflow of blood into the right ventricle

The superior chambers of the heart are called the:

Atria

Which of the following is not a role of the pericardium?

It facilitates heart contraction.

Which is correctly paired?

Ectopic focus: an abnormal pacemaker

The lining of the heart chambers is called the:

Endocardium

Into which chamber of the heart do the pulmonary veins deliver blood?

Left atrium

The most muscular chamber of the heart is the ________.

Left ventricle

Which of the following would lead to a decrease in heart rate?

Parasympathetic stimulation

In the fetus, blood from the left and right sides of the heart normally mix.

True

Which of the following is a difference between cardiac muscle and skeletal muscle?

Unlike skeletal muscle cells, cardiac muscle cells can be autorhythmic.

The P wave of an electrocardiogram represents:

atrial depolarization

The second heart sound (the 'dup' of 'lub-dup') is caused by:

closure of the semilunar valves.

Freshly oxygenated blood is delivered to the _____ and then it passes into the _______, to be pumped to the entire body.

left atrium; left ventricle

The role of the atrioventricular node (AV node) is to:

slow down impulses so that the atria can contract to fill the adjacent ventricles with blood.