Physiology Of The Neuron Flashcards
1
Q
Na
A
Extracellular- 145
Intracellular- 10
2
Q
K
A
Extracellular- 4
Intracellular- 140
3
Q
Ca
A
Extracellular: 2-2.5
Intracellular- <1
4
Q
Mg
A
Extracellular- 2
Intracellular- 50
5
Q
Cl
A
Extracellular- 105
Intracellular- 4
6
Q
PO4
A
Extracellular- 2
Intracellular- 75
7
Q
HCO3
A
Extracellular- 24
Intracellular- 10
8
Q
Principle location of VGNAC
A
In axon
Concentrated in nodes of Ranvier
9
Q
Absolute refractory period
A
Time when VgNaC are in the inactivated state
10
Q
Examples of absolute refractory period
A
- Cardioplegic solution
- Succinylcholine
- Locals anesthetics
11
Q
Action potential is what type of event
A
All or nothing
12
Q
Most responsible for resting membrane potential
A
Leaky K channels
13
Q
Most responsible for depolarization of axon
A
Diffusion of Na into ions
14
Q
Most responsible for repolarization of axon
A
K diffusing out of cell
