Question 1

Match the structure with the appropriate description.
-aortic semilunar valve

Accepted Answer

A)  located between the right atrium and the right ventricle
B)  has only two valve flaps
C)  located at the opening to the aorta
D)  a depression in the atrial septum
E)  ridges and columns on the interior walls of ventriclesF) A) and D)
G) A) and C)

Question 2

Which of the following is NOT true about the heart?

Accepted Answer

A)   The heart is about the size of a closed fist.
B)   The heart is located in the mediastinum.
C)   The apex of the heart is directed superiorly and to the left.
D)   Knowing the heart's position is important for effective CPR.E) All of the above
F) A) and B)

Question 3

Blood vessels enter and exit from the _____ of the heart.

Accepted Answer

A)   apex
B)   base
C)   auricles
D)   trigone
E)   inferior aspectF) A) and B)
G) All of the above

Question 4

When ventricular pressure exceeds atrial pressure, the

Accepted Answer

A)   ejection occurs.
B)   atria pump blood into the ventricles.
C)   ventricle is in diastole.
D)   blood is pumped into the atrium.
E)   AV valves close.F) A) and B)
G) D) and E)

Question 5

Match the structure with the appropriate description.
-fossa ovalis

Accepted Answer

A)  located between the right atrium and the right ventricle
B)  has only two valve flaps
C)  located at the opening to the aorta
D)  a depression in the atrial septum
E)  ridges and columns on the interior walls of ventriclesF) A) and B)
G) A) and C)

Question 6

An increase in extracellular calcium generally increases

Accepted Answer

A)   the heart rate.
B)   the force of contraction.
C)   autonomic stimulation of the heart.
D)   sodium channel opening.
E)   the frequency of the action potentials.F) None of the above
G) A) and E)

Question 7

Which blood vessel carries blood from the left ventricle?

Accepted Answer

A)   aorta
B)   right atrium
C)   pulmonary trunk
D)   pulmonary arteries
E)   pulmonary veinsF) A) and D)
G) A) and E)

Question 8

The dicrotic notch in the aortic pressure curve is due to the

Accepted Answer

A)   increase in intraventricular pressure during ejection.
B)   backflow of blood toward the ventricles.
C)   closure of the left AV valve.
D)   elasticity of the arterial wall.
E)   closure of the semilunar valves.F) C) and E)
G) A) and B)

Question 9

-Identify structure "A" on the heart diagram.

Accepted Answer

A)   left atrium
B)   aortic semilunar valve
C)   bicuspid (mitral)  valve
D)   right atrium
E)   pulmonary semilunar valveF) A) and B)
G) A) and E)

Question 10

Stimulation of the heart via the sympathetic nerves would

Accepted Answer

A)   decrease heart rate.
B)   decrease stroke volume.
C)   increase the force of ventricular contraction.
D)   increase end-systolic volume.
E)   not affect heart rate and force of contraction.F) A) and D)
G) A) and E)

Question 11

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

Accepted Answer

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 - aortaF) A) and E)
G) B) and D)

Question 12

Which of the following will increase the heart rate?

Accepted Answer

A)   a rise in pH
B)   an increase in the level of carbon dioxide in the blood
C)   an increase in the level of blood oxygen
D)   an increase in blood pressure
E)   a decrease in the level of carbon dioxide in the bloodF) B) and E)
G) A) and C)

Question 13

Why is body temperature sometimes reduced during heart surgery?

Accepted Answer

A)   to slow respiration
B)   to increase heart rate
C)   to decrease heart rate
D)   to increase the oxygen content of bloodE) All of the above
F) None of the above

Question 14

An incompetent pulmonary semilunar valve could result in less blood reaching the

Accepted Answer

A)   lungs.
B)   heart muscle.
C)   right ventricle.
D)   aorta.
E)   right atrium.F) B) and D)
G) A) and D)

Question 15

A spontaneously developing local potential in the SA node is called a ________ ___________.

Accepted Answer

The answer of A spontaneously developing local potential in the...

Question 16

End-diastolic volume minus end-systolic volume is equal to

Accepted Answer

A)   cardiac output.
B)   cardiac reserve.
C)   pulse volume.
D)   venous return.
E)   stroke volume.F) A) and B)
G) A) and C)

Question 17

Use the following two choices:
- ↓\downarrow↓  pH

Accepted Answer

A)  ↑ heart rate
B)  ↓ heart rate C) A) and B)
D) undefined

Question 18

If cardiac muscle cells are unable to repolarize, this would cause

Accepted Answer

A)   cardiac output to increase.
B)   no harm. These cells can spontaneously depolarize anyway.
C)   the heart rate to decrease. It might cause cardiac arrest.
D)   an increased demand on mitochondria to produce more ATP.
E)   tachycardia.F) A) and E)
G) B) and E)

Question 19

Within normal limits, an increase in preload leads to

Accepted Answer

A)   an increase in cardiac output and force of left ventricular contraction.
B)   a decrease in cardiac output and force of left ventricular contraction.
C)   an increase in cardiac output and a decrease in force of left ventricular contraction.
D)   a decrease in cardiac output and an increase in the force of left ventricular contraction.
E)   a decrease in stroke volume and heart rate.F) B) and C)
G) B) and E)

Question 20

-Identify structure "E" on the heart diagram.

Accepted Answer

A)   left atrium
B)   aortic semilunar valve
C)   bicuspid (mitral)  valve
D)   right atrium
E)   pulmonary semilunar valveF) A) and B)
G) A) and E)

Exam 20: Cardiovascular System: the Heart

An increase in extracellular calcium generally increases

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Stimulation of the heart via the sympathetic nerves would

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Blood vessels enter and exit from the _____ of the heart.

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Within normal limits, an increase in preload leads to

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Why is body temperature sometimes reduced during heart surgery?

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Which blood vessel carries blood from the left ventricle?

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The dicrotic notch in the aortic pressure curve is due to the

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

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-Identify structure "E" on the heart diagram.

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A spontaneously developing local potential in the SA node is called a ________ ___________.

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Which of the following will increase the heart rate?

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Match the structure with the appropriate description. -aortic semilunar valve

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-Identify structure "A" on the heart diagram.

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End-diastolic volume minus end-systolic volume is equal to

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When ventricular pressure exceeds atrial pressure, the

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Match the structure with the appropriate description. -fossa ovalis

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Which of the following is NOT true about the heart?

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Use the following two choices: - ↓\downarrow↓ pH

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An incompetent pulmonary semilunar valve could result in less blood reaching the

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If cardiac muscle cells are unable to repolarize, this would cause

Correct AnswerverifiedShow Answer

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A spontaneously developing local potential in the SA node is called a ___.

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Use the following two choices: - $\downarrow$ pH

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