Question 1

A patient is prescribed a calcium channel blocker to prevent angina (chest pain), by decreasing the demand for oxygen. Explain why.

Accepted Answer

By preventing the influx of calcium ions...

Question 2

An older woman complains of shortness of breath and intermittent fainting spells. Her doctor runs various tests and finds that the atrioventricular (AV) node is not functioning properly. What is the suggested treatment?

Accepted Answer

The suggested treatment is surgery to implant an artificial pacemaker.

Question 3

Select the correct statement about cardiac output.

Accepted Answer

A)   Decreased venous return will result in increased end diastolic volume.
B)   Stroke volume increases if end diastolic volume decreases.
C)   A slow heart rate increases end diastolic volume, stroke volume, and force of contraction.
D)   If a semilunar valve were partially obstructed, the end systolic volume in the affected ventricle would be decreased.E) A) and D)
F) C) and D) C

Question 4

Which of the following receive(s)  blood during ventricular systole?

Accepted Answer

A)   pulmonary arteries only
B)   aorta only
C)   pulmonary veins only
D)   both the aorta and pulmonary trunkE) A) and B)
F) B) and C)

Question 5

Cardiac muscle has more mitochondria and depends less on a continual supply of oxygen than does skeletal muscle.

Accepted Answer

A) True 
 B)False

Question 6

Anastomoses among coronary arterial branches provide collateral routes for blood delivery to the heart muscle.

Accepted Answer

A) True 
 B)False  True

Question 7

The atrioventricular (AV)  valves are closed__________ .

Accepted Answer

A)   when the ventricles are in systole
B)   by the movement of blood from atria to ventricles
C)   while the atria are contracting
D)   when the ventricles are in diastoleE) C) and D)
F) B) and D)

Question 8

Which of the following is NOT part of the intrinsic conduction system of the heart?

Accepted Answer

A)   sinoatrial (S
A)   node
B)   atrioventricular (AV)  valve
C)   atrioventricular (AV)  node
D)   bundle branchesE) C) and D)
F) B) and C)

Question 9

Which is most responsible for the synchronized contraction of cardiac muscle tissue?

Accepted Answer

A)   small motor units
B)   branching cells
C)   desmosomes
D)   gap junctionsE) A) and B)
F) None of the above

Question 10

Which is NOT a vessel that brings blood directly into the right atrium?

Accepted Answer

A)   pulmonary vein
B)   superior vena cava
C)   coronary sinus
D)   inferior vena cavaE) A) and B)
F) None of the above

Question 11

Exercise results in skeletal muscles compressing veins which encourages blood to return to the heart. In this scenario, which of the following is correct?

Accepted Answer

A)   end diastolic volume (EDV)  decreases
B)   venous return decreases
C)   stroke volume decreases
D)   preload increasesE) A) and B)
F) A) and C)

Question 12

During the period of ventricular filling__________, .

Accepted Answer

A)   the atria remain in diastole
B)   the aortic and pulmonary semilunar valves are open
C)   blood flows mostly passively from the atria through the atrioventricular (AV)  valves into the ventricles
D)   pressure in the heart is at its peakE) None of the above
F) A) and B)

Question 13

Select the correct statement about the structure of the heart wall.

Accepted Answer

A)   Connective tissue in the heart wall aids in the conduction of the action potential.
B)   The fibrous cardiac skeleton forms the bulk of the heart.
C)   The heart chambers are lined by the endomysium.
D)   The myocardium is the layer of the heart that actually contracts.E) All of the above
F) C) and D)

Question 14

During exercise, which of the following would occur on an electrocardiogram (ECG)  compared to an individual at rest?

Accepted Answer

A)   the time from one R to the R of the next heartbeat would decrease
B)   the P-R interval would decrease
C)   the S-T segment would decrease
D)   the T wave would decreaseE) None of the above
F) A) and D)

Question 15

Which of the following is NOT an age-related change affecting the heart?

Accepted Answer

A)   thinning of the valve flaps
B)   atherosclerosis
C)   fibrosis of cardiac muscle
D)   decline in cardiac reserveE) All of the above
F) A) and D)

Question 16

The Frank-Starling Law states that, if other factors are constant, a __________.

Accepted Answer

A)   higher end diastolic volume will produce a higher stroke volume
B)   higher stroke volume will produce a higher end diastolic volume
C)   higher stroke volume will produce a lower end diastolic volume
D)   higher end diastolic volume will produce a lower stroke volumeE) All of the above
F) C) and D)

Question 17

What is the difference between the auricles and the atria?

Accepted Answer

Auricles are the flaplike appendages att...

Question 18

Norepinephrine acts on the heart by__________ .

Accepted Answer

A)   causing a decrease in stroke volume
B)   causing threshold to be reached more quickly
C)   decreasing heart contractility
D)   blocking the action of calciumE) C) and D)
F) None of the above

Question 19

Which chambers of the heart contain oxygenated blood?

Accepted Answer

A)   right and left ventricles
B)   right atrium and ventricle
C)   left atrium and ventricle
D)   right and left atriaE) All of the above
F) B) and C)

Question 20

The left side of the heart pumps the same volume of blood as the right.

Accepted Answer

A) True 
 B)False

Exam 18: The Cardiovascular System: the Heart

A patient is prescribed a calcium channel blocker to prevent angina (chest pain), by decreasing the demand for oxygen. Explain why.

Correct AnswerverifiedBy preventing the influx of calcium ions...View AnswerShow Answer

An older woman complains of shortness of breath and intermittent fainting spells. Her doctor runs various tests and finds that the atrioventricular (AV) node is not functioning properly. What is the suggested treatment?

Correct AnswerverifiedThe suggested treatment is surgery to implant an artificial pacemaker.

Select the correct statement about cardiac output.

Correct AnswerverifiedC

Which of the following receive(s) blood during ventricular systole?

Correct AnswerverifiedShow Answer

Cardiac muscle has more mitochondria and depends less on a continual supply of oxygen than does skeletal muscle.

Correct AnswerverifiedShow Answer

Anastomoses among coronary arterial branches provide collateral routes for blood delivery to the heart muscle.

Correct AnswerverifiedTrue

The atrioventricular (AV) valves are closed__________ .

Correct AnswerverifiedShow Answer

Which of the following is NOT part of the intrinsic conduction system of the heart?

Correct AnswerverifiedShow Answer

Which is most responsible for the synchronized contraction of cardiac muscle tissue?

Correct AnswerverifiedShow Answer

Which is NOT a vessel that brings blood directly into the right atrium?

Correct AnswerverifiedShow Answer

Exercise results in skeletal muscles compressing veins which encourages blood to return to the heart. In this scenario, which of the following is correct?

Correct AnswerverifiedShow Answer

During the period of ventricular filling__________, .

Correct AnswerverifiedShow Answer

Select the correct statement about the structure of the heart wall.

Correct AnswerverifiedShow Answer

During exercise, which of the following would occur on an electrocardiogram (ECG) compared to an individual at rest?

Correct AnswerverifiedShow Answer

Which of the following is NOT an age-related change affecting the heart?

Correct AnswerverifiedShow Answer

The Frank-Starling Law states that, if other factors are constant, a __________.

Correct AnswerverifiedShow Answer

What is the difference between the auricles and the atria?

Correct AnswerverifiedAuricles are the flaplike appendages att...View AnswerShow Answer

Norepinephrine acts on the heart by__________ .

Correct AnswerverifiedShow Answer

Which chambers of the heart contain oxygenated blood?

Correct AnswerverifiedShow Answer

The left side of the heart pumps the same volume of blood as the right.

Correct AnswerverifiedShow Answer

Correct Answer
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By preventing the influx of calcium ions...
View Answer

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The suggested treatment is surgery to implant an artificial pacemaker.

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C

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True

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Auricles are the flaplike appendages att...
View Answer

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