Question 1

What term is used to identify the period that follows depolarization of the myocardium and represents a period during which no new cardiac potential can be propagated?

Accepted Answer

A)   Absolute refractory
B)   Hyperpolarization
C)   Resting
D)   ThresholdE) A) and B)
F) B) and C)

Question 2

What is the nurse monitoring when observing the QRS complex on the electrocardiogram?

Accepted Answer

A)   Ventricular activity
B)   Pulmonary artery closure
C)   Mitral valve opening
D)   Aortic valve closingE) A) and B)
F) C) and D)

Question 3

The cardiac electrical impulse normally begins spontaneously in the sinoatrial (SA)  node because it:

Accepted Answer

A)   has a superior location in the right atrium.
B)   is the only area of the heart capable of spontaneous depolarization.
C)   has rich sympathetic innervation via the vagus nerve.
D)   depolarizes more rapidly than other automatic cells of the heart.E) A) and B)
F) B) and C)

Question 4

What represents the sum of all ventricular muscle cell depolarization?

Accepted Answer

A)   PR interval
B)   QRS complex
C)   QT interval
D)   P waveE) A) and B)
F) C) and D)

Question 5

Baroreceptors are located in the:

Accepted Answer

A)   renal artery.
B)   superior vena cava.
C)   carotid artery.
D)   circle of Willis.E) B) and C)
F) A) and D)

Question 6

The thoracic lymphatic duct drains into the:

Accepted Answer

A)   left subclavian artery.
B)   right atrium.
C)   right subclavian vein.
D)   left subclavian vein.E) A) and B)
F) B) and C)

Question 7

A 20 year old underwent an echocardiogram to assess chest pain.Results revealed a congenital defect in the papillary muscles.Which of the following would the nurse expect to occur?

Accepted Answer

A)   Closure of the semilunar valve
B)   Backward expulsion of the atrioventricular valves
C)   Closure of the atrioventricular valve
D)   Backward expulsion of the semilunar valvesE) None of the above
F) B) and D)

Question 8

Which statement indicates the nurse understands coronary ostia? The coronary ostia (the openings to the coronary arteries)  are found in the:

Accepted Answer

A)   left ventricle.
B)   inferior vena cava.
C)   coronary sinus.
D)   aorta.E) B) and C)
F) C) and D)

Question 9

A nurse assesses the heart after acetylcholine because the effect of acetylcholine on the heart is to:

Accepted Answer

A)   decrease the refractory period.
B)   increase calcium influx.
C)   increase the strength of myocardial contraction.
D)   decrease the heart rate.E) A) and D)
F) A) and C) D

Question 10

A nurse is discussing the pressure generated at the end of diastole.Which term is the nurse describing?

Accepted Answer

A)   Preload
B)   Afterload
C)   Systemic vascular resistance
D)   Total peripheral resistanceE) B) and C)
F) B) and D)

Question 11

A function of the pericardium is to:

Accepted Answer

A)   provide a barrier against extracardial infections.
B)   improve blood flow through the heart.
C)   play a role in cardiac conduction.
D)   assist in cardiac contraction.E) All of the above
F) A) and B)

Question 12

Blood flow is affected by: (Select all that apply.)

Accepted Answer

A)   blood viscosity.
B)   blood vessel diameter.
C)   blood pressure.
D)   blood vessel length.
E)   blood composition.F) A) and B)
G) D) and E)

Question 13

The molecule that aids in bonding of the troponin complex to actin and tropomyosin is troponin:

Accepted Answer

A)   C.
B)   I.
C)   T.
D)   M.E) None of the above
F) All of the above

Question 14

What are the thickened areas of the sarcolemma of myocardial cells that enable electrical impulses to travel in a continuous cell-to-cell fashion called?

Accepted Answer

A)   Myosins
B)   Intercalated disks
C)   Troponin Ts
D)   I bandsE) B) and C)
F) All of the above

Question 15

A nurse is evaluating stroke volume.Which of the following factors affect stroke volume? (Select all that apply.)

Accepted Answer

A)   Preload
B)   Peripheral vascular resistance
C)   Afterload
D)   Ejection fraction
E)   ContractilityF) None of the above
G) B) and D)

Question 16

After activation of the Bainbridge reflex in a patient, the nurse assesses for:

Accepted Answer

A)   increased heart rate.
B)   decreased blood pressure.
C)   increased rate and depth of respirations.
D)   decreased myocardial contractility.E) A) and D)
F) All of the above A

Question 17

A 28 year old with seizure disorder has a vagus nerve stimulator implanted to help control seizure activity.Which result will the nurse expect to occur?

Accepted Answer

A)   Increased speed of cardiac cycle
B)   Increased cardiac contractility
C)   Decreased vasodilation
D)   Decreased cardiac conductionE) A) and D)
F) B) and D)

Question 18

As a result of blockage in the pulmonary artery, blood would first back up into the:

Accepted Answer

A)   aorta.
B)   left ventricle.
C)   pulmonary veins.
D)   right ventricle.E) A) and D)
F) B) and C)

Question 19

As stated by the Frank-Starling law, there is a direct relationship between the _____ of the blood in the heart at the end of diastole and the _____ of contraction during the next systole.

Accepted Answer

A)   pressure; duration
B)   volume; force
C)   viscosity; force
D)   viscosity; durationE) All of the above
F) A) and B)

Question 20

Depolarization of a cardiac muscle cell occurs as the result of:

Accepted Answer

A)   a decrease in the permeability of the cell membrane to ions.
B)   the rapid movement of ions across the cell membrane.
C)   a blockade by calcium ions.
D)   stimuli instigated during the refractory period.E) A) and B)
F) A) and C) B

Exam 25: Structure and Function of the Cardiovascular and Lymphatic Systems

What term is used to identify the period that follows depolarization of the myocardium and represents a period during which no new cardiac potential can be propagated?

Correct AnswerverifiedShow Answer

What is the nurse monitoring when observing the QRS complex on the electrocardiogram?

Correct AnswerverifiedShow Answer

The cardiac electrical impulse normally begins spontaneously in the sinoatrial (SA) node because it:

Correct AnswerverifiedShow Answer

What represents the sum of all ventricular muscle cell depolarization?

Correct AnswerverifiedShow Answer

Baroreceptors are located in the:

Correct AnswerverifiedShow Answer

The thoracic lymphatic duct drains into the:

Correct AnswerverifiedShow Answer

A 20 year old underwent an echocardiogram to assess chest pain.Results revealed a congenital defect in the papillary muscles.Which of the following would the nurse expect to occur?

Correct AnswerverifiedShow Answer

Which statement indicates the nurse understands coronary ostia? The coronary ostia (the openings to the coronary arteries) are found in the:

Correct AnswerverifiedShow Answer

A nurse assesses the heart after acetylcholine because the effect of acetylcholine on the heart is to:

Correct AnswerverifiedD

A nurse is discussing the pressure generated at the end of diastole.Which term is the nurse describing?

Correct AnswerverifiedShow Answer

A function of the pericardium is to:

Correct AnswerverifiedShow Answer

Blood flow is affected by: (Select all that apply.)

Correct AnswerverifiedShow Answer

The molecule that aids in bonding of the troponin complex to actin and tropomyosin is troponin:

Correct AnswerverifiedShow Answer

What are the thickened areas of the sarcolemma of myocardial cells that enable electrical impulses to travel in a continuous cell-to-cell fashion called?

Correct AnswerverifiedShow Answer

A nurse is evaluating stroke volume.Which of the following factors affect stroke volume? (Select all that apply.)

Correct AnswerverifiedShow Answer

After activation of the Bainbridge reflex in a patient, the nurse assesses for:

Correct AnswerverifiedA

A 28 year old with seizure disorder has a vagus nerve stimulator implanted to help control seizure activity.Which result will the nurse expect to occur?

Correct AnswerverifiedShow Answer

As a result of blockage in the pulmonary artery, blood would first back up into the:

Correct AnswerverifiedShow Answer

As stated by the Frank-Starling law, there is a direct relationship between the _____ of the blood in the heart at the end of diastole and the _____ of contraction during the next systole.

Correct AnswerverifiedShow Answer

Depolarization of a cardiac muscle cell occurs as the result of:

Correct AnswerverifiedB

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D

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A

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As stated by the Frank-Starling law, there is a direct relationship between the _ of the blood in the heart at the end of diastole and the _ of contraction during the next systole.

Correct Answer
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B