Ion Channels Flashcards
1
Q
Membrane potential
A
The difference between the voltage outside if the cell, versus the voltage inside of the cell
2
Q
Main Ions
A
Na+
K+
Cl-
Ca++
3
Q
If Ion channels open and Lets Na+ and K- in, then the membrane potential
A
INCREASES
4
Q
If the ion channel opens and let in Cl-, then the membrane potential is
A
Decreased
5
Q
3 types of ion channels
A
- Ligand-gated
- voltage-gated
- non-gated
6
Q
Ligand-gated
A
Will only open its gate in the presence of a ligand/ neurotransmitter
7
Q
Voltage-gated
A
Will only open its gate in the change of voltage/ membrAne potential
8
Q
Non-gated
A
Always open and has no gate
9
Q
Flux
A
Movement of ion across a membrane
10
Q
Influx
A
Coming into cell
11
Q
Outflux
A
Coming out of cell
12
Q
2 factors in determining movement
A
Concentration gradient
Electrical gradient
13
Q
Concentration gradient is STRONGER /OVER POWERED OVER
A
Electrical gradient
