Question 1

Match cardiovascular feature with correct characteristic.
a.angina pectoris
b.embolus
c.atherosclerosis
d.thrombus
-Referred cardiac pain

Accepted Answer

The answer of Match cardiovascular feature with correct characteristic.
a.angina pectoris
b.embolus
c.atherosclerosis
d.thrombus
-Referred...

Question 2

The function of the atrioventricular node is to

Accepted Answer

A) excite the left and right atrium 
B) control the heart rate 
C) prevent the atria and ventricles from contracting simultaneously 
D) repolarize the heart after systole 
E) stimulate ventricular contractile cells directly

Question 3

One important function of the intrinsic control of the heart (Frank-Starling law of the heart) is to equalize the left and right cardiac outputs.

Accepted Answer

A) True 
 B)False

Question 4

The dicrotic notch on the aortic pressure curve is due to

Accepted Answer

A) a disturbance set up by the aortic valve closing 
B) a disturbance set up when the AV valves close 
C) elastic recoil of the aorta during ventricular diastole 
D) turbulent flow through a stenotic valve 
E) atherosclerosis in the aorta

Question 5

Match EKG feature with the correct characteristic.
a.P wave
b.QRS complex
c.T wave
d.PR interval
e.TP interval
f.ST segment
-Time when L-type Ca²⁺ channels in atrial contractile cells are closing

Accepted Answer

The answer of Match EKG feature with the correct characteristic.
a.P...

Question 6

Which factor(s) would decrease cardiac output?

Accepted Answer

A) increased venous return 
B) decreased vagal stimulation of the heart 
C) increased preload 
D) decreased preload 
E) Both a and c

Question 7

____________________ carries cholesterol to cells, whereas ____________________ transports it away from cells.

Accepted Answer

The answer of ____________________ carries cholesterol to cells, whereas ____________________...

Question 8

Pacemaker activity by the Purkinje fibers is an example of an ectopic focus.

Accepted Answer

A) True 
 B)False

Question 9

The AV node

Accepted Answer

A) is the normal pacemaker of the heart 
B) is the only electrical connection between the atria and the ventricles 
C) rapidly conducts impulses from the atria to the ventricles so that they contract simultaneously 
D) is not innervated by the vagus nerve 
E) has the slowest rate of depolarization in the heart

Question 10

Which is true when your sympathetic nervous system is more active?

Accepted Answer

A) The SA node depolarizes more rapidly. 
B) The myocardium repolarizes more frequently during one minute. 
C) More Ca₂₊ becomes available and causes more forceful heart contractions. 
D) Norepinephrine is stimulating the heart. 
E) All of the above are true.

Question 11

An action potential spreads through the atria by gap junctions, but there are no gap junctions present in the ventricles, so the impulse must be propagated throughout the ventricular myocardium by the bundle of His and Purkinje system.

Accepted Answer

A) True 
 B)False

Question 12

Use the following answer code to compare the magnitude of the items in question.
a.A is greater than b.b.B is greater than a.c.A and B are equal or nearly equal.
-a.Resistance and pressure in the pulmonary circulation
B.Resistance and pressure in the systemic circulation

Accepted Answer

The answer of Use the following answer code to compare...

Question 13

During the period of ____________________ and the period of ____________________ in the cardiac cycle, all heart valves are closed.

Accepted Answer

The answer of During the period of ____________________ and the...

Question 14

Use the answer code below to complete the following statements.
a.stroke volume
b.end-diastolic volume
c.cardiac output
d.heart rate
e.end-systolic volume
f.sympathetic activity
g.stroke volume and heart rate
h.end-diastolic volume and end-systolic volume
i.end-diastolic volume and sympathetic activity
-The volume of blood ejected by each ventricle each beat is known as the _____.

Accepted Answer

The answer of Use the answer code below to complete...

Question 15

The aortic valve

Accepted Answer

A) prevents the backflow of blood into the aorta during ventricular diastole 
B) prevents the backflow of blood into the left ventricle during ventricular diastole 
C) prevents the backflow of blood into the right ventricle during ventricular diastole 
D) closes when the first heart sound is heard 
E) does not do any of the above

Question 16

An increase in cardiac sympathetic activity ____________________ the stroke volume.

Accepted Answer

The answer of An increase in cardiac sympathetic activity ____________________...

Question 17

Use the following answer code to indicate which factor involved in the initiation and spread of cardiac excitation is being identified
a.SA node
b.AV node
c.bundle of His and Purkinje system
d.gap junctions
-Delays conduction of the impulse

Accepted Answer

The answer of Use the following answer code to indicate...

Question 18

Cardiac output

Accepted Answer

A) is the volume of blood pumped by each ventricle during each contraction or beat 
B) is the volume of blood pumped by each ventricle per minute 
C) equals heart rate divided by stroke volume 
D) is both a and c 
E) is both b and c

Question 19

Becoming more physically fit ____________________ a person's cardiac reserve.

Accepted Answer

The answer of Becoming more physically fit ____________________ a person's...

Question 20

Use the following answer code to compare the magnitude of the items in question.
a.A is greater than b.b.B is greater than a.c.A and B are equal or nearly equal.
-a.Volume of blood pumped out by the left side of the heart
B.Volume of blood pumped out by the right side of the heart

Accepted Answer

The answer of Use the following answer code to compare...

Exam 9: Cardiac Physiology

Match cardiovascular feature with correct characteristic. a.angina pectoris b.embolus c.atherosclerosis d.thrombus -Referred cardiac pain

The function of the atrioventricular node is to

One important function of the intrinsic control of the heart (Frank-Starling law of the heart) is to equalize the left and right cardiac outputs.

The dicrotic notch on the aortic pressure curve is due to

Match EKG feature with the correct characteristic. a.P wave b.QRS complex c.T wave d.PR interval e.TP interval f.ST segment -Time when L-type Ca²⁺ channels in atrial contractile cells are closing

Which factor(s) would decrease cardiac output?

carries cholesterol to cells, whereas transports it away from cells.

Pacemaker activity by the Purkinje fibers is an example of an ectopic focus.

The AV node

Which is true when your sympathetic nervous system is more active?

An action potential spreads through the atria by gap junctions, but there are no gap junctions present in the ventricles, so the impulse must be propagated throughout the ventricular myocardium by the bundle of His and Purkinje system.

Use the following answer code to compare the magnitude of the items in question. a.A is greater than b.b.B is greater than a.c.A and B are equal or nearly equal. -a.Resistance and pressure in the pulmonary circulation B.Resistance and pressure in the systemic circulation

During the period of and the period of in the cardiac cycle, all heart valves are closed.

The aortic valve

An increase in cardiac sympathetic activity ____________________ the stroke volume.

Use the following answer code to indicate which factor involved in the initiation and spread of cardiac excitation is being identified a.SA node b.AV node c.bundle of His and Purkinje system d.gap junctions -Delays conduction of the impulse

Cardiac output

Becoming more physically fit ____________________ a person's cardiac reserve.

Use the following answer code to compare the magnitude of the items in question. a.A is greater than b.b.B is greater than a.c.A and B are equal or nearly equal. -a.Volume of blood pumped out by the left side of the heart B.Volume of blood pumped out by the right side of the heart