Cardiac Action Potential Flashcards
1
Q
Plateau of action potential
A
PHASE 2
transient INCREASE in Ca conductance —> inward Ca current and increase in K conductance
2
Q
PACEMAKER of the HEART
A
SA node
3
Q
Accounts for the PACEMAKER activity of the SA node (automaticity)
A
PHASE 4
-slow depolarization
Na funny current
4
Q
Upstroke of AP — Plateau
NO AP can be initiated
A
Absolute Refractory Period (ARP)
5
Q
Conducted AP CANNOT be elicited
A
Effective Refractory Period (ERP)
6
Q
AP can be ELICITED BUT more than usual inward current is required
A
Relative Refractory Period (RRP)
