Ion Channels Flashcards Preview

Anatomy EXAM 3 > Ion Channels > Flashcards

Flashcards in Ion Channels Deck (13):
1

Membrane potential

The difference between the voltage outside if the cell, versus the voltage inside of the cell

2

Main Ions

Na+
K+
Cl-
Ca++

3

If Ion channels open and Lets Na+ and K- in, then the membrane potential

INCREASES

4

If the ion channel opens and let in Cl-, then the membrane potential is

Decreased

5

3 types of ion channels

- Ligand-gated
- voltage-gated
-non-gated

6

Ligand-gated

Will only open its gate in the presence of a ligand/ neurotransmitter

7

Voltage-gated

Will only open its gate in the change of voltage/ membrAne potential

8

Non-gated

Always open and has no gate

9

Flux

Movement of ion across a membrane

10

Influx

Coming into cell

11

Outflux

Coming out of cell

12

2 factors in determining movement

Concentration gradient
Electrical gradient

13

Concentration gradient is STRONGER /OVER POWERED OVER

Electrical gradient