Action Potentials Flashcards
1
Q
Polarized
A
One side of plasma membrane has a different charge than the other (at rest)
2
Q
Resting potential
A
Axon is not conducting impulse, -70mv
3
Q
Sodium potassium pump
A
Active transport, 3 K+ pumped in and 2 Na+ pumped out
4
Q
Action potential
A
Rapid change in polarity
5
Q
Depolarization
A
Inside of plasma membrane is more + than the outside
6
Q
Repolarization
A
Inside returns to -
7
Q
Sodium and potassium gates
A
Voltage activated that change in shape, allowing K+ and Na+ to freely flow
8
Q
Steps of an action potential
A
Resting potential, depolarization (+40mv), repolarization, afterpolarization (below -70mv then back to -70mv)
9
Q
Self propagating
A
Ion channels are prompted to open when membrane depolarizes
10
Q
An action potential is considered…
A
All or nothing
