Deck 1: Electrophysiology

Question 1

The inherent rate of the AV junction is ________ bpm.

A)20-40
B)40-60
C)60-100
D)100-120

Answer 1

B

Question 2

If polarizing is considered the ready state,then ________ would be considered the recovery state.

A)discharge
B)polarization
C)repolarization
D)depolarization

Answer 2

C

Question 3

Which cardiac cells are responsible for initiating and conducting pacemaker impulses?

A)Motor cells
B)Mechanical cells
C)Electrical cells
D)Atrioventricular cells

Answer 3

C

Question 4

What term is used to refer to the process of electrical discharge and the flow of electrical activity?

A)Repolarization
B)Depolarization
C)Polarization
D)Polarized

Question 5

After leaving the area of the AV node,impulses go through the ________ to reach the right and left bundle branches.

A)Purkinje fibers
B)Bundle of His
C)AV junction
D)SA node

Question 6

What is the term for the fail-safe mechanism that allows a lower pacemaker to take over when a higher site fails?

A)Polarization
B)Irritability
C)AV conduction
D)Escape

Question 7

Which of the following does NOT happen when the sympathetic branch is stimulated?

A)Heart rate increases.
B)The heart becomes more irritable.
C)Impulses go faster through the AV node.
D)Ventricular conduction slows down.

Question 8

When stimulated,the ________ branch of the nervous system increases heart rate,AV conduction,and irritability.

A)parasympathetic
B)sympathetic
C)pacemaker
D)inherent

Question 9

The inherent rate of the ventricle is ________ bpm.

A)20-40
B)40-60
C)60-100
D)100-120

Question 10

Part of the parasympathetic branch of the autonomic nervous system is the ________ nerve.

A)vagus
B)coronary
C)aortic
D)pericardial

Question 11

The built-in rate of each of the three major areas of the conduction system is referred to as the ________ rate.

A)fast
B)heart
C)escape
D)inherent

Question 12

Which of the following best explains the mechanism called irritability?

A)The ventricles repolarize before they are ready.
B)The normal pacemaker slows down and gives up control.
C)A lower pacemaker site speeds up to take control of the heart.
D)The normal pacemaker changes its inherent rate.

Question 13

Which of the following is NOT a part of the normal cardiac conduction system?

A)Coronary sinus
B)AV node
C)Purkinje Fibers
D)Internodal pathways

Question 14

Which is the normal pacemaker of the heart?

A)SA node
B)AV node
C)AV junction
D)Ventricle

Question 15

The inherent rate of the SA node is ________ bpm.

A)30-60
B)40-60
C)60-100
D)100-120