Action potentials Flashcards
1
Q
aka nerve impulse or muscle impulse
A
action potential
2
Q
What is involved in an action potential?
A
the reversal of a membrane potential and the return to the resting state
3
Q
Action potentials are _____ or _______ and there is a threshold that must be met.
A
all or none
-55mV for most neurons
4
Q
When is the resting state?
A
prior to the action potential
5
Q
What is happening with the voltage gates, K+, and Na+ during the resting state?
A
voltage-gated channels are closed
K+ leaks out
Na+ leaks in
6
Q
How many gates does voltage gated Na+ channels have?
A
2 gates
7
Q
What are the 2 types of gates in the voltage-gated Na+ channels?
A
one activation gate
one inactivation gate
8
Q
Ine the resting stae how is the activation and inactivation gates?
A
activation gate is closed
inactivation gate is open
