Question 1

What are indications for synchronized cardioversion?
I. Unstable atrial fibrillation
II. Atrial flutter
III. Atrial Tachycardia
IV. Ventricular fibrillation

Accepted Answer

A)  I, II, and III only 
B)  I and III only 
C)  IV only 
D)  I, II, II, and IV only 
A)  I, II, and III only 
B)  I and III only 
C)  IV only 
D)  I, II, II, and IV only A

Question 2

What effect does stimulation of the parasympathetic neural fibers have on the contactility and AV conduction of the heart?

Accepted Answer

A)  Contractility would increase and AV conduction would decrease 
B)  Both contractility and AV conduction would increase 
C)  AV conduction would decrease and contractility would not be affected 
D)  Both contractility and AV conduction would decrease 
A)  Contractility would increase and AV conduction would decrease 
B)  Both contractility and AV conduction would increase 
C)  AV conduction would decrease and contractility would not be affected 
D)  Both contractility and AV conduction would decrease D

Question 3

What are the three primary electrolytes responsible for the electrical difference across the resting membrane potential?

Accepted Answer

A)  potassium sodium, and chloride 
B)  sodium, chloride, and potassium 
C)  sodium, chloride, and bicarbonate 
D)  potassium, sodium, and calcium 
A)  potassium sodium, and chloride 
B)  sodium, chloride, and potassium 
C)  sodium, chloride, and bicarbonate 
D)  potassium, sodium, and calcium D

Question 4

What is the term for the time in which cells cannot respond to a stimulus?

Accepted Answer

A)  partial resistance period 
B)  nonrefractory period 
C)  absolute refractory period 
D)  relative refractory period 
A)  partial resistance period 
B)  nonrefractory period 
C)  absolute refractory period 
D)  relative refractory period

Question 5

During which phase of the action potential do the voltage-sensitive ion channels return to their pre-depolarization permeability?

Accepted Answer

A)  Phase 0 
B)  Phase 4 
C)  Phase 3 
D)  Phase 5 
A)  Phase 0 
B)  Phase 4 
C)  Phase 3 
D)  Phase 5

Question 6

Which phase of the action potential represents initial repolarization of the myocardial cells?

Accepted Answer

A)  Phase 1 
B)  Phase 3 
C)  Phase 2 
D)  Phase 0 
A)  Phase 1 
B)  Phase 3 
C)  Phase 2 
D)  Phase 0

Question 7

Which structure transmits the electrical impulse from the SA node to the left atrium?

Accepted Answer

A)  AV junction 
B)  Bachmann's bundle 
C)  Purkinje fibers 
D)  bundle of His 
A)  AV junction 
B)  Bachmann's bundle 
C)  Purkinje fibers 
D)  bundle of His

Question 8

At the end of Phase 0, what does the voltage inside the myocardial cell equal?

Accepted Answer

A)  +30 mV 
B)  +15 mV 
C)  -30 mV 
D)  -90 mV 
A)  +30 mV 
B)  +15 mV 
C)  -30 mV 
D)  -90 mV

Question 9

What does the RMP of the myocardial cells equal?

Accepted Answer

A)  -30 mV 
B)  -50 mV 
C)  -90 mV 
D)  -15 mV 
A)  -30 mV 
B)  -50 mV 
C)  -90 mV 
D)  -15 mV

Question 10

What is the term for the ability of the heart cells to transmit electrical current from cell to cell?

Accepted Answer

A)  irritability 
B)  contractility 
C)  automaticity 
D)  conductivity 
A)  irritability 
B)  contractility 
C)  automaticity 
D)  conductivity

Question 11

At what point do the internodal tracts of the right atrium merge?

Accepted Answer

A)  AV junction 
B)  SA junction 
C)  Purkinje fibers 
D)  Bachmann's bundle 
A)  AV junction 
B)  SA junction 
C)  Purkinje fibers 
D)  Bachmann's bundle

Question 12

Which phases of the action potential represent the absolute refractory period?
I. Phase 0
II. Phase 1
III. Phase 2
IV. First half of Phase 3
V. First half of Phase 4

Accepted Answer

A)  II, III, and IV only 
B)  I, II, and III only 
C)  IV and V only 
D)  I, II, III, and IV only 
A)  II, III, and IV only 
B)  I, II, and III only 
C)  IV and V only 
D)  I, II, III, and IV only

Question 13

What is the term for the unique ability of cells in the SA node to generate an action potential without being stimulated?

Accepted Answer

A)  excitability 
B)  conductivity 
C)  automaticity 
D)  contractility 
A)  excitability 
B)  conductivity 
C)  automaticity 
D)  contractility

Question 14

After the electrical impulse leaves the atrioventricular junction, where does it travel next?

Accepted Answer

A)  Purkinje fibers 
B)  bundle of His 
C)  Bachmann's bundle 
D)  bundle branches 
A)  Purkinje fibers 
B)  bundle of His 
C)  Bachmann's bundle 
D)  bundle branches

Question 15

What effect will stimulation of sympathetic neural fibers have on heart rate and excitability?

Accepted Answer

A)  both will be increased 
B)  heart rate will increase and excitability will be unaffected 
C)  heart rate will increase and excitability will decrease 
D)  both will be decreased 
A)  both will be increased 
B)  heart rate will increase and excitability will be unaffected 
C)  heart rate will increase and excitability will decrease 
D)  both will be decreased

Question 16

What is the term for the ability of cardiac muscle fibers to shorten in response to an electrical stimulus?

Accepted Answer

A)  conductivity 
B)  contractility 
C)  automaticity 
D)  excitability 
A)  conductivity 
B)  contractility 
C)  automaticity 
D)  excitability

Question 17

What is the basic term for the phase in which the heart is not generating an action potential?

Accepted Answer

A)  polarized 
B)  contractile 
C)  depolarized 
D)  conductive 
A)  polarized 
B)  contractile 
C)  depolarized 
D)  conductive

Question 18

What is the term for a transmitted action potential?

Accepted Answer

A)  conduction 
B)  nerve impulse 
C)  stimulus 
D)  action potential 
A)  conduction 
B)  nerve impulse 
C)  stimulus 
D)  action potential

Question 19

Which phase of the action potential prolongs the contraction of the myocardial cells?

Accepted Answer

A)  Phase 3 
B)  Phase 4 
C)  Phase 2 
D)  Phase 5 
A)  Phase 3 
B)  Phase 4 
C)  Phase 2 
D)  Phase 5

Question 20

Which phase of the action potential represents the relative refractory period?

Accepted Answer

A)  First half of Phase 4 
B)  Last half of Phase 4 
C)  First half of Phase 3 
D)  Last half of Phase 3 
A)  First half of Phase 4 
B)  Last half of Phase 4 
C)  First half of Phase 3 
D)  Last half of Phase 3

What are indications for synchronized cardioversion? I. Unstable atrial fibrillation II. Atrial flutter III. Atrial Tachycardia IV. Ventricular fibrillation

What effect does stimulation of the parasympathetic neural fibers have on the contactility and AV conduction of the heart?

What are the three primary electrolytes responsible for the electrical difference across the resting membrane potential?

What is the term for the time in which cells cannot respond to a stimulus?

During which phase of the action potential do the voltage-sensitive ion channels return to their pre-depolarization permeability?

Which phase of the action potential represents initial repolarization of the myocardial cells?

Which structure transmits the electrical impulse from the SA node to the left atrium?

At the end of Phase 0, what does the voltage inside the myocardial cell equal?

What does the RMP of the myocardial cells equal?

What is the term for the ability of the heart cells to transmit electrical current from cell to cell?

At what point do the internodal tracts of the right atrium merge?

Which phases of the action potential represent the absolute refractory period? I. Phase 0 II. Phase 1 III. Phase 2 IV. First half of Phase 3 V. First half of Phase 4

What is the term for the unique ability of cells in the SA node to generate an action potential without being stimulated?

After the electrical impulse leaves the atrioventricular junction, where does it travel next?

What effect will stimulation of sympathetic neural fibers have on heart rate and excitability?

What is the term for the ability of cardiac muscle fibers to shorten in response to an electrical stimulus?

What is the basic term for the phase in which the heart is not generating an action potential?

What is the term for a transmitted action potential?

Which phase of the action potential prolongs the contraction of the myocardial cells?

Which phase of the action potential represents the relative refractory period?

The Anatomy and Physiology of the Respitory System

Ventilation

Pulmonary Function Measurements

The Diffusion of Pulmonary Gases

The Anatomy and Physiology of the Circulatory System

Oxygen and Carbon Dioxide Transport

Acid-Base Balance and Regulation

Ventilation-Perfusion Relationships

Control of Ventilation

Fetal Development and the Cardiopulmonary System

Aging and the Cardiopulmonary System

The Standard 12-Ecg Lead System

Ecg Interpretation

Hemodynamic Measurements

Renal Failure and Its Effects on the Cardiopulmonary System

Sleep Physiology and Its Relationship to the Cardiopulmonary System

Exercise and Its Effects on the Cardiopulmonary System

High Altitude and Its Effects on the Cardiopulmonary System

High Pressure Environments and Their Effects on the Cardiopulmonary System

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Exam 12: Electrophysiology of the Heart

What are indications for synchronized cardioversion? I. Unstable atrial fibrillation II. Atrial flutter III. Atrial Tachycardia IV. Ventricular fibrillation

What effect does stimulation of the parasympathetic neural fibers have on the contactility and AV conduction of the heart?

What are the three primary electrolytes responsible for the electrical difference across the resting membrane potential?

What is the term for the time in which cells cannot respond to a stimulus?

During which phase of the action potential do the voltage-sensitive ion channels return to their pre-depolarization permeability?

Which phase of the action potential represents initial repolarization of the myocardial cells?

Which structure transmits the electrical impulse from the SA node to the left atrium?

At the end of Phase 0, what does the voltage inside the myocardial cell equal?

What does the RMP of the myocardial cells equal?

What is the term for the ability of the heart cells to transmit electrical current from cell to cell?

At what point do the internodal tracts of the right atrium merge?

Which phases of the action potential represent the absolute refractory period? I. Phase 0 II. Phase 1 III. Phase 2 IV. First half of Phase 3 V. First half of Phase 4

What is the term for the unique ability of cells in the SA node to generate an action potential without being stimulated?

After the electrical impulse leaves the atrioventricular junction, where does it travel next?

What effect will stimulation of sympathetic neural fibers have on heart rate and excitability?

What is the term for the ability of cardiac muscle fibers to shorten in response to an electrical stimulus?

What is the basic term for the phase in which the heart is not generating an action potential?

What is the term for a transmitted action potential?

Which phase of the action potential prolongs the contraction of the myocardial cells?

Which phase of the action potential represents the relative refractory period?

The Anatomy and Physiology of the Respitory System

Ventilation

Pulmonary Function Measurements

The Diffusion of Pulmonary Gases

The Anatomy and Physiology of the Circulatory System

Oxygen and Carbon Dioxide Transport

Acid-Base Balance and Regulation

Ventilation-Perfusion Relationships

Control of Ventilation

Fetal Development and the Cardiopulmonary System

Aging and the Cardiopulmonary System

The Standard 12-Ecg Lead System

Ecg Interpretation

Hemodynamic Measurements

Renal Failure and Its Effects on the Cardiopulmonary System

Sleep Physiology and Its Relationship to the Cardiopulmonary System

Exercise and Its Effects on the Cardiopulmonary System

High Altitude and Its Effects on the Cardiopulmonary System

High Pressure Environments and Their Effects on the Cardiopulmonary System

Filters