Voltage-gated Ion Channel Flashcards Preview

Anatomy EXAM 3 > Voltage-gated Ion Channel > Flashcards

Flashcards in Voltage-gated Ion Channel Deck (13):
1

Where is the voltage-gated ion channels,

found in the axon hillock
- terminals
- nodes of ranvier

2

ONLY TWO TYPES of ions

Na+
K+

3

Axon Hillock says

If you can bring me enough EPSP in comparison to IPSP, to bring the membrane potential to -55, ill initiate an action potential

4

At rest

-70mV

5

Action Potential

+30mV

6

Threshold

+55

7

VG (Na+) Channels

Opens at -55mV
Clases at +30mV

8

VG (K+) Channels

Opens at +30
Closes -70mV

9

At -55mV, the VG _________.

(Na+) channels open

10

Na+ ______, pours into cell until the inside voltage becomes ______.

influxes
+30mV

11

Stops because the ______, then the axon hillock concentration is ______, which leads to neurotransmitter release.

gate closes
+30mV

12

Some of it goes to the next ____, brings it up to______, causing this __.

node
-55mV
gates to open

13

The process _____ down the axon in each _____ until it reaches the terminals.

repeats
node