Definition of Terms Flashcards
1
Q
Contracting cells
A
contraction of the chambers and ejection of blood.
2
Q
Conducting cells
A
responsible for initiating the
electrical stimulus
3
Q
Automaticity
A
initiate an electrical impulse spontaneously
4
Q
Excitability
A
the ability of cardiac cells to reach a threshold and respond to an electrical stimulus
5
Q
Conductivity
A
the ability of the heart to propagate an impulse from cell to cell
6
Q
Contractility
A
the ability of muscle cells to shorten (contract) in response to an electrical
stimulus.
7
Q
Depolarization
A
contraction of cells
8
Q
Repolarization
A
relaxation of cells
9
Q
Refractory period
A
a period of time after a cell has depolarized during which it cannot
depolarize again.
10
Q
Bradycardia
A
Slow heart rate
11
Q
Tachycardia
A
Fast heart rate
