Question 1

2.50 points out of 2.50

Question text

All cardiac veins empty into the ________, which then
empties into the ______.

Select one:

a. coronary sinus;
left atrium

b. coronary sinus;
right atrium

c. great cardiac
vein; right atrium

d. great cardiac
vein; superior vena cava

e. inferior vena
cava; left atrium

Question 2

2.50 points out of 2.50

Question text

A stab wound into the heart can result in cardiac tamponade.
This means that

Select one:

a. blood enters the
pleural cavity.

b. the heart is
compressed by blood in the pericardial sac.

c. the electrical
conduction system of the heart is damaged.

d. the left coronary
artery has been damaged or cut.

e. the heart has lost
all of its blood.

Question 3

2.50 points out of 2.50

Question text

Which vessels empty blood into the left atrium?

Select one:

a. aorta

b. right atrium

c. pulmonary trunk

d. pulmonary arteries

e. pulmonary
veins

Question 4

2.50 points out of 2.50

Question text

The right side of the heart receives blood from the body and
pumps through _________ circulation to the lungs.

Select one:

a. hepatic

b. pulmonary

c. peripheral

d. systemic

Question 5

2.50 points out of 2.50

Question text

The volume of blood pumped during each cardiac cycle is the

Select one:

a. stroke
volume.

b. cardiac output.

c. cardiac reserve.

d. end-systolic
volume.

e. end-diastolic
volume.

Question 6

2.50 points out of 2.50

Question text

The figure illustrates the cardiac action potential. What
does “B” represent?

Select one:

a. early
repolarization phase

b. plateau phase

c. final
repolarization phase

d. depolarization
phase

Question 7

2.50 points out of 2.50

Question text

Which of the following heart chambers is ly associated with
the blood vessel that enters or leaves it?

Select one:

a. right atrium –
pulmonary veins

b. left atrium –
aorta

c. right ventricle –
pulmonary trunk

d. left ventricle –
superior vena cava and inferior vena cava

e. right atrium –
aorta

Question 8

2.50 points out of 2.50

Question text

What vessel exits the left ventricle?

Select one:

a. pulmonary trunk

b. pulmonary vein

c. aorta

d. pulmonary artery

Question 9

2.50 points out of 2.50

Question text

What is the importance of the delay in the action potential
in the AV node?

Select one:

a. It allows the
action potential to reach both ventricles at the same time.

b. It allows an
action potential to reach the left atrium so both atria contract together.

c. It slows the rate
of contraction of the ventricles.

d. It allows time for
the atria to be filled with blood.

Question 10

2.50 points out of 2.50

Question text

Chemoreceptors sensitive to blood oxygen levels are
primarily located in the

Select one:

a. medulla oblongata.

b. carotid
arteries.

c. right atrium.

d. left ventricle.

e. jugular veins.

Question 11

2.50 points out of 2.50

Question text

The chordae tendineae

Select one:

a. connect the atria
to the ventricles.

b. are found in the
interventricular septum.

c. are part of the
conducting system of the heart.

d. connect the flaps
of the AV valves to the papillary muscles.

e. are a part of the
myocardium.

Question 12

2.50 points out of 2.50

Question text

Which of the following factors would cause an increase in
heart rate?

Select one:

a. increased
parasympathetic stimulation

b. stimulation of
baroreceptors in the aorta

c. increased
epinephrine release from the adrenal medulla

d. increased
production of atrial natriuretic factor

e. vagal stimulation

Question 13

2.50 points out of 2.50

Question text

Another name for the visceral pericardium is the

Select one:

a. endocardium.

b. epicardium.

c. isocardium.

d. myocardium.

e. visocardium.

Question 14

2.50 points out of 2.50

Question text

Aortic stenosis results from

Select one:

a. a hole in the
interatrial septum.

b. a weakening of
heart muscle.

c. a narrowed opening
through the aortic valve.

d. low oxygen levels.

e. leakage from the
AV valves.

Question 15

2.50 points out of 2.50

Question text

The valve located between the right ventricle and the
pulmonary trunk is the

Select one:

a. aortic semilunar
valve.

b. pulmonary
semilunar valve.

c. tricuspid valve.

d. mitral valve.

e. bicuspid valve.

Question 16

2.50 points out of 2.50

Question text

The period of time in which the myocardium is insensitive to
further stimulation is called the

Select one:

a. absolute
refractory period.

b. hyperpolarization
period.

c. AV period.

d. SA period.

e. ectopic focus.

Question 17

2.50 points out of 2.50

Question text

Which of the following layers forms the bulk of the heart
wall?

Select one:

a. epicardium

b. pericardium

c. endocardium

d. myocardium

e. visceral
pericardium

Question 18

2.50 points out of 2.50

Question text

Which of the following is mismatched?

Select one:

a. opening of sodium
channels – depolarization

b. closing of calcium
channels – plateau phase

c. opening of
potassium channels – rapid repolarization

d. closure of sodium
channels – early repolarization

e. opening of calcium
channels – plateau phase

Question 19

2.50 points out of 2.50

Question text

When a pacemaker potential in the SA node reaches threshold,

Select one:

a. the permeability
to K+ ions increases.

b. many voltage-gated
Ca2+ channels open.

c. voltage-gated Ca2+
channels close.

d. RMP has been
restored.

e. permeability of
the cell does not change.

Question 20

2.50 points out of 2.50

Question text

Blood does not enter or leave the ventricles during the
period called

Select one:

a. ejection.

b. rapid filling.

c. atrial systole.

d. isovolumetric
contraction.

e. active and passive
filling.