Question 1

In a healthy adult at rest,approximately how much time is required for the entire heart to depolarize?

Accepted Answer

A)  0.22 seconds 
B)  0.02 seconds 
C)  2.2 seconds 
D)  0.002 seconds 
A)  0.22 seconds 
B)  0.02 seconds 
C)  2.2 seconds 
D)  0.002 seconds

Question 2

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

Question 3

What is the term for the ability of a cell to reach its threshold potential and respond to a stimulus?

Accepted Answer

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

Question 4

Where does the electrical impulse travel after leaving the AV bundle?

Accepted Answer

A)  left and right bundle branches 
B)  bundle of His 
C)  Purkinje fibers 
D)  SA node 
A)  left and right bundle branches 
B)  bundle of His 
C)  Purkinje fibers 
D)  SA node

Question 5

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

Question 6

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

Accepted Answer

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

Question 7

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

Accepted Answer

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

In a healthy adult at rest,approximately how much time is required for the entire heart to depolarize?

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

What is the term for the ability of a cell to reach its threshold potential and respond to a stimulus?

Where does the electrical impulse travel after leaving the AV bundle?

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?

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

The Anatomy and Physiology of the Respiratory System

Ventilation

Pulmonary Function Measurements

The Diffusion of Pulmonary Gases

The Anatomy and Physiology of the Circulatory System

Oxygen and Carbon DioxideTransport

Acid Base Balance

Ventilation Perfusion Relationships

Control of Ventilation

Fetal Development and the Cardiopulmonary System

Aging and the Cardiopulmonary System

The Standard 12 ECG 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

In a healthy adult at rest,approximately how much time is required for the entire heart to depolarize?

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

What is the term for the ability of a cell to reach its threshold potential and respond to a stimulus?

Where does the electrical impulse travel after leaving the AV bundle?

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?

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

The Anatomy and Physiology of the Respiratory System

Ventilation

Pulmonary Function Measurements

The Diffusion of Pulmonary Gases

The Anatomy and Physiology of the Circulatory System

Oxygen and Carbon DioxideTransport

Acid Base Balance

Ventilation Perfusion Relationships

Control of Ventilation

Fetal Development and the Cardiopulmonary System

Aging and the Cardiopulmonary System

The Standard 12 ECG 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