Quiz 1-Circulatory system-Anatomy and Physiology

Question 1

The term “collateral circulation” refers to:

Select one:
a. both sides of the heart receiving blood at the
same time.
b. blood being sent from the atria into the
ventricles.
c. an alternative path for blood flow in case of
blockage
d. blood flow to the lungs and heart at the same
time

Answer 1

c. an alternative path for blood flow in case of blockage

Question 2

Stroke volume depends on three factors: preload, cardiac contractility, and:

Select one:

a. afterload.
b. circumflexion.
c. papillary contractitlity
d. atrial response

Answer 2

a. afterload.

Question 3

After blood circulates through the lungs and becomes

Select one:

a. pulmonary arteries
b. myocardial arteries
c. pulmonary veins.
d. superior and inferior vena cava.

Answer 3

c. pulmonary veins

Question 4

The equation used to determine cardiac output is:

Select one:

a. stroke volume × heart rate.
b. systolic pressure × heart rate.
c. preload × stroke volume
d. preload × afterload

Answer 4

a. stroke volume x heart rate.

Question 5

The return of a cardiac muscle cell to its preexcitation resting state is called:

Select one:

a. resting potential
b. depolarization.
c. action potential
d. repolarization.

Answer 5

d. repolarization.

Question 6

The heart contains the ______ valves.

Select one:

a. atrioventricular and semilunar
b. epicardial and pericardial
c. chordae and papillary
d. arterial and ventricular

Answer 6

a. atrioventricular and semilunar

Question 7

A positive chronotropic agent will:

Select one:

a. increase the heart rate.
b. increase the respiratory rate
c. strengthen cardiac contraction
d. speed impulse conduction

Answer 7

a. increase the heart rate.

Question 8

Which of the following statements about the nervous system’s control of the heart is TRUE?

Select one:

a. In the heart’s normal state, the sympathetic system is dominant.
b. During sleep, the parasympathetic and sympathetic systems balance.
c. In stressful situations, the sympathetic system becomes dominant.
d. In the heart’s normal state, the parasympathetic system is dominant.

Answer 8

c. In stressful situations, the sympathetic system becomes dominant.

Question 9

The period of time from the end of one cardiac contraction to the end of the next is called the cardiac:

Select one:

a. fraction.
b. diastole.
c. systole.
d. cycle.

Answer 9

d. cycle

Question 10

Pressure in the filled ventricle at the end of diastole is called:

Select one:

a. afterload.
b. preload.
c. cardiac output.
d. stroke volume.

Answer 10

b. preload

Question 11

The ______ consists of the visceral and parietal layers.

Select one:

a. epicardium
b. endocardium
c. pericardium
d. intracardium

Answer 11

c. pericardium

Question 12

Which of the following statements about the four chambers of the heart is CORRECT?

Select one:
a. Atria are the inferior chambers of the heart.
b. Ventricles are separated by the interventricular
septum.
c. Atria are the two largest chambers of the heart.
d. Ventricles receive incoming blood from the body.

Answer 12

b. Ventricles are separated by the interventricular septum.

Question 13

The term automaticity refers to a cell’s capability of:

Select one:
a.
responding to electrical stimuli.
b. propagating an electrical impulse from one cell
to another.
c. self-depolarization 
d. contraction
or shortening

Answer 13

c. self-depolarization

Question 14

The heart consists of three tissue layers, including the:

Select one:

a. epithelium.
b. endocardium.
c. subcardium
d. parathelium

Answer 14

b. endocardium.

Question 15

The connection points between the arterial and venous systems are called:

Select one:

a. lumens.
b. capillaries
c. venules.
d. tunica.

Answer 15

b. capillaries

Question 16

The heart receives its nutrients from the:

Select one:

a. anterior great cardiac vein
b. blood within its chambers
c. coronary arteries.
d. aorta.

Answer 16

c. coronary arteries

Question 17

Repolarization is influenced by:

Select one:

a. calcium.
b. sodium.
c. potassium.
d. magnesium

Answer 17

c. potassium.

Question 18

The cardiovascular system’s two major components are the heart and

Select one:

a. veins.
b. central blood vessels.
c. peripheral blood vessels.
d. arteries.

Answer 18

c. peripheral blood vessels.

Question 19

Which of the following statements about the circulation of blood is TRUE?

Select one:
a. Intracardiac pressures are higher on the right side of the heart.
b. The left atrium sends oxygenated blood into the
left ventricle
c. Pulmonary arteries are the only arteries that carry oxygenated blood. Incorrect
d. The right myocardium is thicker than the left myocardium

Answer 19

b. The left atrium sends oxygenated blood into the left ventricle.

Question 20

Which of the following statements about arteries is TRUE?

Select one:

a. They always carry oxygenated blood
b. They carry blood away from the heart
c. They carry blood under low pressure
d. They cannot change the size of their lumen

Answer 20

b. They carry blood away from the heart