Question 1

During the isovolumetric contraction period of the cardiac cycle,

Accepted Answer

A)   AV and semilunar valves are closed.
B)   the atria are contracted.
C)   ventricular volume increases.
D)   blood is pumped into the large arteries.
E)   pressure in the ventricles decreases.F) C) and D)
G) A) and E)

Question 2

Variations in respiratory rate is a symptom of

Accepted Answer

A)   sinus arrhythmia.
B)   ventricular tachycardia.
C)   SA node block.
D)   paroxysmal atrial tachycardiaE) A) and D)
F) None of the above

Question 3

An incompetent mitral valve may cause blood to back up into the

Accepted Answer

A)   aorta.
B)   left atrium.
C)   left ventricle.
D)   coronary circulation.
E)   right atrium.F) All of the above
G) B) and E)

Question 4

The chordae tendineae

Accepted Answer

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.F) All of the above
G) B) and D)

Question 5

The product of the stroke volume times the heart rate is known as the

Accepted Answer

A)   end-diastolic volume.
B)   end-systolic volume.
C)   cardiac output.
D)   cardiac reserve.
E)   venous return.F) A) and B)
G) B) and D)

Question 6

In a normal electrocardiogram, the

Accepted Answer

A)   P wave results from repolarization of the atria.
B)   QRS complex results from ventricular depolarization.
C)   P wave occurs after the QRS complex but before the T wave.
D)   T wave represents depolarization of the atria.
E)   repolarization of the atria is clearly visible.F) D) and E)
G) A) and E)

Question 7

Baroreceptor reflexes

Accepted Answer

A)   are triggered by increased blood osmolality.
B)   correct changes in blood pH.
C)   do not impact the activity of the heart.
D)   are of minor importance in humans.
E)   can change heart rate.F) B) and D)
G) A) and B)

Question 8

The chamber of the heart that endures the highest pressure is the

Accepted Answer

A)   right atrium.
B)   left atrium.
C)   right ventricle.
D)   left ventricle.
E)   coronary sinus.F) All of the above
G) A) and E)

Question 9

When comparing cardiac muscle cells and skeletal muscle cells,

Accepted Answer

A)   the rate of action potential propagation is faster in cardiac muscle.
B)   both possess intercalated discs.
C)   only skeletal muscle has a plateau phase in its contraction cycle.
D)   action potentials are conducted from cell to cell only in cardiac muscle.
E)   both are voluntary.F) A) and B)
G) A) and C)

Question 10

Use the following two choices:
- ↑\uparrow↑  in ECF Ca2+ levels

Accepted Answer

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

Question 11

Which vessels empty blood into the left atrium?

Accepted Answer

A)   aorta
B)   right atrium
C)   pulmonary trunk
D)   pulmonary arteries
E)   pulmonary veinsF) B) and D)
G) All of the above

Question 12

The relationship between preload and stroke volume is known as

Accepted Answer

A)   extrinsic regulation.
B)   cardiac reserve.
C)   Starling Law of the heart.
D)   minute volume.E) C) and D)
F) B) and C)

Question 13

The heart

Accepted Answer

A)   is a four-chambered muscular pump.
B)   is posterior to the trachea.
C)   is lined with an epithelial layer called epicardium.
D)   lies mostly to the right of the midline of the sternum.
E)   has a superior apex and an inferior base.F) A) and B)
G) B) and E)

Question 14

Which of the following is mismatched?

Accepted Answer

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 phaseF) A) and E)
G) C) and D)

Question 15

What cardiac arrhythmia will have no QRS complex as a symptom?

Accepted Answer

A)   atrial fibrillation
B)   ventricular fibrillation
C)   bradycardia
D)   premature ventricular contractionsE) A) and B)
F) A) and C)

Question 16

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

Accepted Answer

A)   aortic semilunar valve.
B)   pulmonary semilunar valve.
C)   tricuspid valve.
D)   mitral valve.
E)   bicuspid valve.F) A) and B)
G) A) and C)

Question 17

Contraction of the ventricles is referred to as ventricular

Accepted Answer

A)   systole.
B)   diastole.
C)   fibrillation.
D)   ischemia.
E)   depolarization.F) C) and E)
G) C) and D)

Question 18

Match the drug with its effects.
-beta blocking agent

Accepted Answer

A)  binds to epinephrine receptors
B)  prevents clot formation
C)  can reduce calcium diffusion rate into myocardial cells
D)  frequently given to people with restricted coronary blood flow in order to reduce preload
E)  used to treat high blood pressureF) B) and E)
G) None of the above

Question 19

Which vessels transport blood to the right and left lungs?

Accepted Answer

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

Question 20

Excess potassium ions in cardiac tissue cause

Accepted Answer

A)   an increased heart rate.
B)   a rapid repolarization of cardiac cells.
C)   a decrease in the frequency of action potentials in the conduction system.
D)   an increase in stroke volume.
E)   an increase in the frequency of action potentials.F) B) and E)
G) C) and E)

Exam 20: Cardiovascular System: the Heart

Which of the following is mismatched?

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The heart

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Use the following two choices: - ↑\uparrow↑ in ECF Ca2+ levels

Correct AnswerverifiedShow Answer

When comparing cardiac muscle cells and skeletal muscle cells,

Correct AnswerverifiedShow Answer

The chordae tendineae

Correct AnswerverifiedShow Answer

The chamber of the heart that endures the highest pressure is the

Correct AnswerverifiedShow Answer

The relationship between preload and stroke volume is known as

Correct AnswerverifiedShow Answer

During the isovolumetric contraction period of the cardiac cycle,

Correct AnswerverifiedShow Answer

Excess potassium ions in cardiac tissue cause

Correct AnswerverifiedShow Answer

Baroreceptor reflexes

Correct AnswerverifiedShow Answer

An incompetent mitral valve may cause blood to back up into the

Correct AnswerverifiedShow Answer

Variations in respiratory rate is a symptom of

Correct AnswerverifiedShow Answer

What cardiac arrhythmia will have no QRS complex as a symptom?

Correct AnswerverifiedShow Answer

Which vessels transport blood to the right and left lungs?

Correct AnswerverifiedShow Answer

The product of the stroke volume times the heart rate is known as the

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Contraction of the ventricles is referred to as ventricular

Correct AnswerverifiedShow Answer

In a normal electrocardiogram, the

Correct AnswerverifiedShow Answer

Match the drug with its effects. -beta blocking agent

Correct AnswerverifiedShow Answer

Which vessels empty blood into the left atrium?

Correct AnswerverifiedShow Answer

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Use the following two choices: - $\uparrow$ in ECF Ca²⁺ levels

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