Medical Quiz

Heart Quiz


What are the thick inferior chambers of the heart that pump blood into the arteries called?

A. Ventricles

B. Atria

C. Auricles

D. Trabeculae carneae

E. AV valves

What is the double-walled sac that surrounds the heart called?

A. Fibrocardium

B. Endocardium

C. Epicardium

D. Pericardium

E. Pericardial cavity

The Frank-Starling law of the heart states that an additional stretch of the myocardium produces a significant increase in __________ on the next beat.

A. contraction force

B. afterload

C. electrical activity

D. None of the choices are correct.

E. cardiac reserve

Which of the following is the correct formula for calculating cardiac output?

A. HR – SV



D. HR + SV

E. HR x SV

The amount of tension in the ventricular myocardium immediately before it contracts is called _________.

A. contractility

B. afterload

C. preload

D. cardiac reserve

E. None of the choices is correct.

Which term refers to relaxation of the heart?

A. Diastole

B. Systole

C. Asystole

D. Fibrillation

E. Bradycardia

If the right ventricle begins to pump an increased amount of blood, this soon arrives at the left ventricle, stretches it more than before, and causes it to increase its stroke volume and match that of the right. This is an example of __________.

A. preload

B. afterload

C. contractility

D. cardiac reserve

E. None of the choices are correct.

What is the study of the heart and its disorders called?

A. Myology

B. Hematology

C. Angiography

D. Cardiology

E. Pulmonology

The difference between the maximum and resting cardiac output is called __________.

A. preload

B. stroke volume

C. contractility

D. afterload

E. cardiac reserve

Which of the following has a strong, positive inotropic effect, meaning it increases the strength of each contraction of the heart?

A. Hypocalcemia

B. Hypercalcemia

C. Hyperkalemia

D. Myocardial hypercapnia

E. Myocardial hypoxia

Which circuit carries blood from the right ventricle to the lungs for gas exchange and returns it to the left atrium of the heart?

A. Coronary

B. Systemic

C. Pulmonary

D. Lymphatic

E. Fetal

What is the ability to rhythmically depolarize without outside stimulation called?

A. Autorhythmic

B. Automatic

C. Myogenic

D. Contractile

E. Autonomic

As a heart chamber contracts, what happens to the pressure of the fluid within it?

A. It increases.

B. It decreases.

C. It neither increases nor decreases.

D. It decreases then increases.

E. It remains constant then decreases.

Heart sound __________ is thought to result from the transition from expansion of the empty ventricles to their sudden filling with blood.

A. S1

B. S2

C. S3

D. S4

E. S0

If a person’s heart is pumping 5000 mL of blood in one minute and the heart rate is 50 beats per minute, what is the cardiac output?

A. 250,000 mL/min

B. 25,000 mL/min

C. 100 mL/min

D. 1000 mL/min

E. None of these are correct.

As exercise progresses, muscular activity __________ venous return. This increases the __________ on the right ventricle.

A. decreases; preload

B. increases; afterload

C. increases; preload

D. decreases; afterload

E. decreases; midload

Which of the following is a recording of all nodal and myocardial action potentials in the heart?






The passage of blood from the atria to the ventricles is regulated by which valves?

A. Interventricular

B. Interatrial

C. Semilunar

D. Atrioventricular

E. Pulmonary

What is the broad flat superior top portion of the heart called?

A. Base

B. Apex

C. Border

D. Origin


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