Question 1

Which of the following is happening during atrial systole?

Accepted Answer

A)  The ventricles are relaxed. 
B)  The AV valves are closed. 
C)  The atria pump blood into the ventricles. 
D)  More than one of the above are true. 
A)  The ventricles are relaxed. 
B)  The AV valves are closed. 
C)  The atria pump blood into the ventricles. 
D)  More than one of the above are true.

Question 2

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 3

A very anxious person appears in the ER.He has a heart rate of 160 b/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 4

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 5

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 6

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 7

Which of the following describes Starling's law of the heart?

Accepted Answer

A)  An increase in venous return to the ventricles causes an increase in cardiac output. 
B)  An increase in preload increases cardiac output. 
C)  A decrease in preload decreases cardiac output. 
D)  All of the above are true. 
A)  An increase in venous return to the ventricles causes an increase in cardiac output. 
B)  An increase in preload increases cardiac output. 
C)  A decrease in preload decreases cardiac output. 
D)  All of the above are true.

Question 8

Which of the following is least related to tachydysrhythmias?

Accepted Answer

A)  Sympathetic nervous system activation 
B)  Beta1-adrenergic receptor activation 
C)  (+) Dromotropic effect 
D)  Vagal discharge 
A)  Sympathetic nervous system activation 
B)  Beta1-adrenergic receptor activation 
C)  (+) Dromotropic effect 
D)  Vagal discharge

Question 9

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 10

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 11

Increased return of the blood to the heart stretches the muscle,thereby

Accepted Answer

A)  stimulating the sympathetic nerve. 
B)  activating the beta1-adrenergic receptors. 
C)  closing the AV valves. 
D)  increasing stroke volume. 
A)  stimulating the sympathetic nerve. 
B)  activating the beta1-adrenergic receptors. 
C)  closing the AV valves. 
D)  increasing stroke volume.

Question 12

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 13

With which of the following is inotropism most associated?

Accepted Answer

A)  Heart rate 
B)  Force of myocardial contraction 
C)  Oxygen saturation 
D)  Systemic vascular resistance 
A)  Heart rate 
B)  Force of myocardial contraction 
C)  Oxygen saturation 
D)  Systemic vascular resistance

Question 14

Which of the following is least likely to increase cardiac output?

Accepted Answer

A)  Increased heart rate 
B)  Increased stroke volume 
C)  Increased venous return 
D)  Vagal discharge 
A)  Increased heart rate 
B)  Increased stroke volume 
C)  Increased venous return 
D)  Vagal discharge

Question 15

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 16

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 17

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 18

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 19

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.

Question 20

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

Exam 17: Function of the Heart

Which of the following is happening during atrial systole?

Which of the following most accurately describes the vagus nerve?

A very anxious person appears in the ER.He has a heart rate of 160 b/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).

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

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

Which of the following is least related to a bradycardia?

Which of the following describes Starling's law of the heart?

Which of the following is least related to tachydysrhythmias?

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

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

Increased return of the blood to the heart stretches the muscle,thereby

Which of the following does not happen to a ventricle?

With which of the following is inotropism most associated?

Which of the following is least likely to increase cardiac output?

Cardiac output is determined by heart rate and

Vagal stimulation on the heart

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

Sympathetic stimulation to the heart

A stenotic aortic valve

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

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

Anatomy of the 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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