Question 1

Which of the following is the most likely consequence of acute left ventricular failure?

Accepted Answer

A) Jugular vein distention 
B) Hepatomegaly and splenomegaly 
C) Pulmonary edema 
D) Pedal edema 
A) Jugular vein distention 
B) Hepatomegaly and splenomegaly 
C) Pulmonary edema 
D) Pedal edema

Question 2

Which of the following elicits the same effect as vagomimetic activity?

Accepted Answer

A) Beta₁ blockade 
B) Activation of the alpha1-adrenergic receptors by ACh 
C) Activation of the muscarinic receptors by NE 
D) Use of a muscarinic agonist 
A) Beta₁ blockade 
B) Activation of the alpha1-adrenergic receptors by ACh 
C) Activation of the muscarinic receptors by NE 
D) Use of a muscarinic agonist

Question 3

Which of the following is the same as end-diastolic volume?

Accepted Answer

A) Stroke volume 
B) Cardiac output 
C) Preload 
D) Cardiac reserve 
A) Stroke volume 
B) Cardiac output 
C) Preload 
D) Cardiac reserve

Question 4

Which term refers to the amount of blood pumped by the heart in 1 minute?

Accepted Answer

A) Stroke volume 
B) Cardiac output 
C) Starling's law of the heart 
D) Inotropic effect 
A) Stroke volume 
B) Cardiac output 
C) Starling's law of the heart 
D) Inotropic effect

Question 5

Starling's law of the heart relates force of myocardial contraction with

Accepted Answer

A) heart rate. 
B) preload. 
C) end-systolic volume. 
D) blood pressure. 
A) heart rate. 
B) preload. 
C) end-systolic volume. 
D) blood pressure.

Question 6

Which of the following is most likely to increase stroke volume?

Accepted Answer

A) A (+) inotropic drug 
B) A vagolytic drug 
C) A (-) chronotropic drug 
D) A Beta₁-adrenergic blocker 
A) A (+) inotropic drug 
B) A vagolytic drug 
C) A (-) chronotropic drug 
D) A Beta₁-adrenergic blocker

Question 7

An increased preload

Accepted Answer

A) decreases cardiac output. 
B) increases stroke volume. 
C) increases cardiac reserve. 
D) increases afterload. 
A) decreases cardiac output. 
B) increases stroke volume. 
C) increases cardiac reserve. 
D) increases afterload.

Question 8

Heart rate and stroke volume determine

Accepted Answer

A) hematocrit. 
B) total blood volume. 
C) cardiac output. 
D) the size of the heart valves. 
A) hematocrit. 
B) total blood volume. 
C) cardiac output. 
D) the size of the heart valves.

Question 9

Sympathetic stimulation to the heart

Accepted Answer

A) decreases stroke volume. 
B) increases heart rate. 
C) causes bradycardia. 
D) decreases cardiac output. 
A) decreases stroke volume. 
B) increases heart rate. 
C) causes bradycardia. 
D) decreases cardiac output.

Question 10

Which of the following most accurately describes the vagus nerve?

Accepted Answer

A) Fight or flight 
B) Norepinephrine 
C) Parasympathetic 
D) Causes tachycardia 
A) Fight or flight 
B) Norepinephrine 
C) Parasympathetic 
D) Causes tachycardia

Question 11

What happens during ventricular diastole?

Accepted Answer

A) The ventricles are filling with blood. 
B) All semilunar valves are open. 
C) Both AV valves are closed. 
D) Blood is pumped to the lungs and systemic circulation. 
A) The ventricles are filling with blood. 
B) All semilunar valves are open. 
C) Both AV valves are closed. 
D) Blood is pumped to the lungs and systemic circulation.

Question 12

An ejection fraction of 30% is

Accepted Answer

A) normal. 
B) characteristic of a healthy person who is engaged in aerobic exercise. 
C) characteristic of a failing heart. 
D) the amount of oxygenated hemoglobin in the blood in the left ventricle. 
A) normal. 
B) characteristic of a healthy person who is engaged in aerobic exercise. 
C) characteristic of a failing heart. 
D) the amount of oxygenated hemoglobin in the blood in the left ventricle.

Question 13

Which of the following is least related to a bradycardia?

Accepted Answer

A) Greater than 60 beats/min 
B) Vagal discharge 
C) (-) Chronotropic effect 
D) Parasympathetic nerve stimulation of the SA node 
A) Greater than 60 beats/min 
B) Vagal discharge 
C) (-) Chronotropic effect 
D) Parasympathetic nerve stimulation of the SA node

Question 14

A drug (e.g. ,atropine) that blocks the effects of the vagus nerve

Accepted Answer

A) stops the heart. 
B) increases heart rate. 
C) decreases cardiac output. 
D) decreases stroke volume. 
A) stops the heart. 
B) increases heart rate. 
C) decreases cardiac output. 
D) decreases stroke volume.

Question 15

Which of the following is not the result of the firing of the sympathetic nerves on the heart?

Accepted Answer

A) (+) Inotropic effect 
B) (+) Chronotropic effect 
C) Increased heart rate 
D) Vagally induced bradycardia 
A) (+) Inotropic effect 
B) (+) Chronotropic effect 
C) Increased heart rate 
D) Vagally induced bradycardia

Question 16

Under what condition is end-diastolic volume (EDV) most likely to increase while ejection fraction decreases?

Accepted Answer

A) Exercise 
B) Sympathetic nerve stimulation 
C) (+) Inotropic response 
D) Heart failure 
A) Exercise 
B) Sympathetic nerve stimulation 
C) (+) Inotropic response 
D) Heart failure

Question 17

A very anxious person appears in the ER.He has a heart rate of 160 beats/min and indicates that he has a history of panic attacks.He is prescribed an antianxiety agent and a drug to slow his heart rate.Identify the drug (to slow heart rate).

Accepted Answer

A) Muscarinic antagonist 
B) Beta₁-adrenergic blocker 
C) Sympathomimetic 
D) Vagolytic 
A) Muscarinic antagonist 
B) Beta₁-adrenergic blocker 
C) Sympathomimetic 
D) Vagolytic

Question 18

Atropine is anticholinergic and antimuscarinic and therefore

Accepted Answer

A) causes a (+) inotropic effect. 
B) increases the force of myocardial contraction. 
C) decreases heart rate. 
D) is used to treat bradydysrhythmias such as heart block and a prolonged P-R interval. 
A) causes a (+) inotropic effect. 
B) increases the force of myocardial contraction. 
C) decreases heart rate. 
D) is used to treat bradydysrhythmias such as heart block and a prolonged P-R interval.

Question 19

Which of the following does not happen to a ventricle?

Accepted Answer

A) Activation of the Beta₁-adrenergic receptors 
B) Discharge of sympathetic nerves 
C) Discharge of the vagal nerve 
D) Binding of norepinephrine to its receptor 
A) Activation of the Beta₁-adrenergic receptors 
B) Discharge of sympathetic nerves 
C) Discharge of the vagal nerve 
D) Binding of norepinephrine to its receptor

Exam 17: Function of the Heart

Which of the following is the most likely consequence of acute left ventricular failure?

Which of the following elicits the same effect as vagomimetic activity?

Which of the following is the same as end-diastolic volume?

Which term refers to the amount of blood pumped by the heart in 1 minute?

Starling's law of the heart relates force of myocardial contraction with

Which of the following is most likely to increase stroke volume?

An increased preload

Heart rate and stroke volume determine

Sympathetic stimulation to the heart

Which of the following most accurately describes the vagus nerve?

What happens during ventricular diastole?

An ejection fraction of 30% is

Which of the following is least related to a bradycardia?

A drug (e.g. ,atropine) that blocks the effects of the vagus nerve

Which of the following is not the result of the firing of the sympathetic nerves on the heart?

Under what condition is end-diastolic volume (EDV) most likely to increase while ejection fraction decreases?

A very anxious person appears in the ER.He has a heart rate of 160 beats/min and indicates that he has a history of panic attacks.He is prescribed an antianxiety agent and a drug to slow his heart rate.Identify the drug (to slow heart rate).

Atropine is anticholinergic and antimuscarinic and therefore

Which of the following does not happen to a ventricle?

Introduction to the Human Body

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Integumentary System and Body Temperature

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Anatomy of the Heart

Anatomy of the Blood Vessels and Special Circulations

Functions of the Blood Vessels

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