Question 1

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 2

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

Question 3

Which of the following refers to a positive inotropic effect?

Accepted Answer

A)  heart block 
B)  a slow heart rate 
C)  a rapid heartbeat 
D)  an increased myocardial contractile force 
A)  heart block 
B)  a slow heart rate 
C)  a rapid heartbeat 
D)  an increased myocardial contractile force

Question 4

Which term refers to the amount of blood pumped by the heart in one 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

Vagal stimulation on the heart

Accepted Answer

A)  increases the force of myocardial contraction. 
B)  increases the amount of blood that flows into the heart from the vena cava. 
C)  causes tachycardia. 
D)  slows the heart rate. 
A)  increases the force of myocardial contraction. 
B)  increases the amount of blood that flows into the heart from the vena cava. 
C)  causes tachycardia. 
D)  slows the heart rate.

Question 6

Furosemide (Lasix),a potent diuretic,is administered in acute ventricular failure in order to

Accepted Answer

A)  strengthen myocardial contractile force. 
B)  increase plasma K⁺. 
C)  excrete excess water and relieve the edema. 
D)  relieve pain. 
A)  strengthen myocardial contractile force. 
B)  increase plasma K⁺. 
C)  excrete excess water and relieve the edema. 
D)  relieve pain.

Question 7

Milliliters/beat x beats/minute defines

Accepted Answer

A)  stroke volume. 
B)  ejection fraction. 
C)  cardiac reserve. 
D)  cardiac output. 
A)  stroke volume. 
B)  ejection fraction. 
C)  cardiac reserve. 
D)  cardiac output.

Question 8

Which of the following is descriptive of a drug that causes a (+)inotropic effect,a (+)dromotropic effect,and a (+)chronotropic effect?

Accepted Answer

A)  vagomimetic 
B)  sympathomimetic 
C)  antimuscarinic 
D)  parasympatholytic 
A)  vagomimetic 
B)  sympathomimetic 
C)  antimuscarinic 
D)  parasympatholytic

Question 9

Cardiac output is determined by heart rate and

Accepted Answer

A)  systemic vascular resistance. 
B)  stroke volume. 
C)  hematocrit. 
D)  hemoglobin concentration. 
A)  systemic vascular resistance. 
B)  stroke volume. 
C)  hematocrit. 
D)  hemoglobin concentration.

Question 10

Which of the following drugs is sympathomimetic?

Accepted Answer

A)  beta1 adrenergic blocker 
B)  muscarinic agonist 
C)  vagolytic 
D)  beta1 adrenergic agonist 
A)  beta1 adrenergic blocker 
B)  muscarinic agonist 
C)  vagolytic 
D)  beta1 adrenergic agonist

Question 11

Atropine is a muscarinic antagonist and is therefore used to

Accepted Answer

A)  relieve bradycardia. 
B)  decrease heart rate. 
C)  block the effects of norepinephrine. 
D)  increase myocardial contractile force. 
A)  relieve bradycardia. 
B)  decrease heart rate. 
C)  block the effects of norepinephrine. 
D)  increase myocardial contractile force.

Question 12

Systole and diastole describe the function of the

Accepted Answer

A)  pericardium. 
B)  SA node. 
C)  myocardium. 
D)  mediastinum. 
A)  pericardium. 
B)  SA node. 
C)  myocardium. 
D)  mediastinum.

Question 13

Sympathetic nerve stimulation of the myocardium

Accepted Answer

A)  causes a (+)inotropic effect. 
B)  decreases cardiac output. 
C)  decreases heart rate. 
D)  decreases stroke volume. 
A)  causes a (+)inotropic effect. 
B)  decreases cardiac output. 
C)  decreases heart rate. 
D)  decreases stroke volume.

Question 14

Which of the following is most likely to relieve an anxiety-induced tachycardia?

Accepted Answer

A)  vagolytic drug 
B)  beta1 adrenergic agonist 
C)  sympathomimetic 
D)  beta1 adrenergic blocker 
A)  vagolytic drug 
B)  beta1 adrenergic agonist 
C)  sympathomimetic 
D)  beta1 adrenergic blocker

Question 15

Which of the following contains 70 ml?

Accepted Answer

A)  the cardiac output 
B)  the volume of a ventricle 
C)  an average stroke volume 
D)  the amount of blood that flows through the pulmonary capillaries in one minute 
A)  the cardiac output 
B)  the volume of a ventricle 
C)  an average stroke volume 
D)  the amount of blood that flows through the pulmonary capillaries in one minute

Question 16

Most of the symptoms of acute left-sided heart failure are

Accepted Answer

A)  relieved by morphine. 
B)  cured by an antibiotic. 
C)  respiratory in nature (e.g.,dyspnea,orthopnea). 
D)  confined to the lower extremities as in pedal edema. 
A)  relieved by morphine. 
B)  cured by an antibiotic. 
C)  respiratory in nature (e.g.,dyspnea,orthopnea). 
D)  confined to the lower extremities as in pedal edema.

Question 17

Digoxin,a drug used in the treatment of heart failure,increases contractile force and is therefore called a

Accepted Answer

A)  diuretic. 
B)  (+)dromotropic agent. 
C)  (+)inotropic agent. 
D)  (+)chronotropic agent. 
A)  diuretic. 
B)  (+)dromotropic agent. 
C)  (+)inotropic agent. 
D)  (+)chronotropic agent.

Question 18

During atrial systole,the

Accepted Answer

A)  AV valves are closed. 
B)  ventricles are relaxed. 
C)  ventricles are in systole. 
D)  semilunar valves are open. 
A)  AV valves are closed. 
B)  ventricles are relaxed. 
C)  ventricles are in systole. 
D)  semilunar valves are open.

Question 19

Which of the following is the most likely consequence of a very rapid heart rate?

Accepted Answer

A)  decreased ventricular filling (with blood) 
B)  failure of the AV valves to open 
C)  failure of the SA node to fire 
D)  failure of the cardiac impulse to enter the His-Purkinje system 
A)  decreased ventricular filling (with blood) 
B)  failure of the AV valves to open 
C)  failure of the SA node to fire 
D)  failure of the cardiac impulse to enter the His-Purkinje system

Question 20

A stenotic aortic valve

Accepted Answer

A)  causes right ventricular hypertrophy and right-sided heart failure. 
B)  increases afterload,thereby increasing the work of the left ventricle. 
C)  causes a right-to-left shunt. 
D)  is a narrowing of the right semilunar valve. 
A)  causes right ventricular hypertrophy and right-sided heart failure. 
B)  increases afterload,thereby increasing the work of the left ventricle. 
C)  causes a right-to-left shunt. 
D)  is a narrowing of the right semilunar valve.

Exam 17: Function of the Heart

An increased preload

Which of the following does not happen to a ventricle?

Which of the following refers to a positive inotropic effect?

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

Vagal stimulation on the heart

Furosemide (Lasix),a potent diuretic,is administered in acute ventricular failure in order to

Milliliters/beat x beats/minute defines

Which of the following is descriptive of a drug that causes a (+)inotropic effect,a (+)dromotropic effect,and a (+)chronotropic effect?

Cardiac output is determined by heart rate and

Which of the following drugs is sympathomimetic?

Atropine is a muscarinic antagonist and is therefore used to

Systole and diastole describe the function of the

Sympathetic nerve stimulation of the myocardium

Which of the following is most likely to relieve an anxiety-induced tachycardia?

Which of the following contains 70 ml?

Most of the symptoms of acute left-sided heart failure are

Digoxin,a drug used in the treatment of heart failure,increases contractile force and is therefore called a

During atrial systole,the

Which of the following is the most likely consequence of a very rapid heart rate?

A stenotic aortic valve

Introduction to the Human Body

Basic Chemistry

Cells

Cell Metabolism

Microbiology Basics

Tissues and Membranes

Integumentary System and Body Temperature

Skeletal System

Muscular System

Nervous System: Nervous Tissue and Brain

Nervous System: Spinal Cord and Peripheral Nerves

Autonomic Nervous System

Sensory System

Endocrine System

Blood

Heart

Anatomy of the Blood Vessels

Functions of the Blood Vessels

Lymphatic System

Immune System

Respiratory System

Digestive System

Urinary System

Water,Electrolyte,and Acid-Base Balance

Reproductive Systems

Human Development and Heredity

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