Action Potential & Synapse Flashcards
1
Q
AP nerve resting potential
A
-70mv
2
Q
At what threshold does AP begin
A
-55mv
3
Q
What is depolarisation (AP)
A
Cell gets less negative as ions move in & out
4
Q
At what threshold does AP fire
A
+35/40mv
5
Q
What is repolarisation (AP)
A
Cell gets more negative as ions move in & out
6
Q
What happens during hyperpolarisation/refractory period (AP)
A
Cell gets extra negative inside before returning to resting state
7
Q
Synaptic transmission
A
- Signal arrives in presynaptic bulb full of vesicles
- vesicles release NTs into the synaptic gap
- NTs diffuse across gap to next receptor
- NTs bind to receptors & start signal again
8
Q
What happens to the excess NTs in synaptic transmission
A
Reuptaken or broken down
