Question 1

Which of the following is an anticipated effect of increasing preload in the healthy heart?

Accepted Answer

A)  Decreased cardiac output 
B)  Decreased myocardial work 
C)  Increased stroke volume 
D)  Increased heart rate 
A)  Decreased cardiac output 
B)  Decreased myocardial work 
C)  Increased stroke volume 
D)  Increased heart rate C

Question 2

What is the anticipated effect of vagal stimulation on the heart?

Accepted Answer

A)  It shortens the refractory period 
B)  It widens the QRS complex 
C)  It slows the heart rate 
D)  It increases the coronary blood supply 
A)  It shortens the refractory period 
B)  It widens the QRS complex 
C)  It slows the heart rate 
D)  It increases the coronary blood supply C

Question 3

Mechanical activation of the heart occurs after electrical excitation because of the action of which of the following ions?

Accepted Answer

A)  Calcium 
B)  Phosphorus 
C)  Sodium 
D)  Potassium 
A)  Calcium 
B)  Phosphorus 
C)  Sodium 
D)  Potassium A

Question 4

Which of the following properties is unique to cardiac pacemaker cells?

Accepted Answer

A)  Automaticity 
B)  Rhythmicity 
C)  Conductivity 
D)  Refractoriness 
A)  Automaticity 
B)  Rhythmicity 
C)  Conductivity 
D)  Refractoriness

Question 5

Vagal stimulation of the heart leads to

Accepted Answer

A)  bradycardia. 
B)  tachycardia. 
C)  ventricular arrhythmias. 
D)  atrial arrhythmias. 
A)  bradycardia. 
B)  tachycardia. 
C)  ventricular arrhythmias. 
D)  atrial arrhythmias.

Question 6

The effective refractory period is when the heart cell

Accepted Answer

A)  may be stimulated by the atrioventricular node. 
B)  cannot respond to a stimulus. 
C)  can create a full action potential. 
D)  responds repetitively. 
A)  may be stimulated by the atrioventricular node. 
B)  cannot respond to a stimulus. 
C)  can create a full action potential. 
D)  responds repetitively.

Question 7

Repolarization as a stage in the action potential of the heart can be seen in which of the following parts of the electrocardiogram?

Accepted Answer

A)  P wave 
B)  PR interval 
C)  QRS complex 
D)  T wave 
A)  P wave 
B)  PR interval 
C)  QRS complex 
D)  T wave

Question 8

The ability of the heart to beat regularly is referred to as which of the following properties of cardiac tissue?

Accepted Answer

A)  Automaticity 
B)  Rhythmicity 
C)  Conductivity 
D)  Refractoriness 
A)  Automaticity 
B)  Rhythmicity 
C)  Conductivity 
D)  Refractoriness

Question 9

The fundamental muscle unit responsible for myocardial contraction is the

Accepted Answer

A)  atrioventricular node. 
B)  sinoatrial node. 
C)  Purkinje fiber. 
D)  sarcomere. 
A)  atrioventricular node. 
B)  sinoatrial node. 
C)  Purkinje fiber. 
D)  sarcomere.

Question 10

Epinephrine and norepinephrine exert which of the following effects on the heart?

Accepted Answer

A)  Decrease the heart rate 
B)  Increase force of myocardial contraction 
C)  Decrease conduction velocity 
D)  Lengthen the refractory period of the atrioventricular junction 
A)  Decrease the heart rate 
B)  Increase force of myocardial contraction 
C)  Decrease conduction velocity 
D)  Lengthen the refractory period of the atrioventricular junction

Question 11

Myocardial tissue is nonresponsive to stimulation during which phase of the cardiac cycle?

Accepted Answer

A)  The final phase of diastole 
B)  The initial phase of systole 
C)  The final phase of systole 
D)  The initial phase of diastole 
A)  The final phase of diastole 
B)  The initial phase of systole 
C)  The final phase of systole 
D)  The initial phase of diastole

Question 12

The cardiac output is the product of which of the following two variables?

Accepted Answer

A)  Stroke volume and peripheral vascular resistance 
B)  Stroke volume and heart rate 
C)  Heart rate and blood pressure 
D)  Heart rate and peripheral vascular resistance 
A)  Stroke volume and peripheral vascular resistance 
B)  Stroke volume and heart rate 
C)  Heart rate and blood pressure 
D)  Heart rate and peripheral vascular resistance

Question 13

The primary initiator of the conduction cycle in the heart is the

Accepted Answer

A)  Purkinje fibers. 
B)  atrioventricular node. 
C)  sinoatrial node. 
D)  bundle of His. 
A)  Purkinje fibers. 
B)  atrioventricular node. 
C)  sinoatrial node. 
D)  bundle of His.

Question 14

Which of the following tissues of the heart are not affected by cardiac drugs?

Accepted Answer

A)  The myocardium 
B)  The pericardium 
C)  The conduction system 
D)  The coronary vessels 
A)  The myocardium 
B)  The pericardium 
C)  The conduction system 
D)  The coronary vessels

Question 15

Depolarization as a stage in the action potential of the heart can be seen in which of the following parts of the electrocardiogram?

Accepted Answer

A)  P wave 
B)  PR interval 
C)  QRS complex 
D)  T wave 
A)  P wave 
B)  PR interval 
C)  QRS complex 
D)  T wave

Exam 24: Overview of the Cardiovascular System

Which of the following is an anticipated effect of increasing preload in the healthy heart?

What is the anticipated effect of vagal stimulation on the heart?

Mechanical activation of the heart occurs after electrical excitation because of the action of which of the following ions?

Which of the following properties is unique to cardiac pacemaker cells?

Vagal stimulation of the heart leads to

The effective refractory period is when the heart cell

Repolarization as a stage in the action potential of the heart can be seen in which of the following parts of the electrocardiogram?

The ability of the heart to beat regularly is referred to as which of the following properties of cardiac tissue?

The fundamental muscle unit responsible for myocardial contraction is the

Epinephrine and norepinephrine exert which of the following effects on the heart?

Myocardial tissue is nonresponsive to stimulation during which phase of the cardiac cycle?

The cardiac output is the product of which of the following two variables?

The primary initiator of the conduction cycle in the heart is the

Which of the following tissues of the heart are not affected by cardiac drugs?

Depolarization as a stage in the action potential of the heart can be seen in which of the following parts of the electrocardiogram?

Orientation to Pharmacology

Legal and Ethical Aspects of Medication Administration

Principles of Drug Action

Medication Errors

The Nursing Process and Pharmacology

Biocultural Aspects of Drug Therapy

Maternal and Child Drug Therapy

Drug Therapy for Older Adults

Substance Misuse and Abuse

Client Education for Self-Administration of Medication

Over-The-Counter Medications

Complementary and Alternative Pharmacology

Overview of the Central Nervous System

Analgesics

Anesthetics

Antianxiety,sedative,and Hypnotic Drugs

Antiepileptic Drugs

Central Nervous System Stimulants

Psychotherapeutic Drugs

Overview of the Autonomic Nervous System

Drugs Affecting the Parasympathetic Nervous System and the Neurotransmitter Acetylcholine

Drugs Affecting the Sympathetic Adrenergicnervous System

Drugs for Specific Dysfunctions of the Central and Peripheral Nervous Systems

Agents Used in the Treatment of Heart Failure

Antidysrhythmics

Antihypertensives

Vasodilators and Blood Viscosityreducing Agents

Overview of the Blood

Antiplatelets,anticoagulants,fibrinolytics,and Blood Components

Antihyperlipidemic Drugs

Overview of the Urinary System

Diuretics

Uricosuric Drugs

Drug Therapy for Renal System Dysfunction

Overview of the Respiratory System

Bronchodilator,antiasthmatic,and Mucolytic Drugs

Oxygen and Miscellaneous Respiratory Agents

Overview of the Gastrointestinal Tract

Drugs Affecting the Gastrointestinal Tract

Overview of the Eye

Ophthalmic Drugs

Overview of the Ear

Drugs Affecting the Ear

Overview of the Endocrine System

Drugs Affecting the Pituitary

Drugs Affecting the Parathyroid and Thyroid Glands

Drugs Affecting the Adrenal Cortex

Drugs Affecting Conditions of the Pancreas

Overview of the Female and Male Reproductive Systems

Drugs Affecting Womens Health and the Female Reproductive System

Drugs for Labor and Delivery

Drugs Affecting the Male Reproductive System

Drugs Affecting Sexual Behavior

Principles of Antineoplastic Chemotherapy

Antineoplastic Chemotherapy Agents

Overview of Infections, inflammation, and Fever

Antibacterials

Antifungal and Antiviral Drugs

Other Antimicrobial Drugs and Antiparasitic Drugs

Overview of the Immunologic System

Serums, vaccines, and Other Immunizing Agents

Immunosuppressants and Immunomodulators

Overview of the Integumentary System

Dermatologic Drugs