Neuronal communication Flashcards
1
Q
ion channel
A
- selective
- diffusion down gradient
- K+
2
Q
Na/K pump
A
- pump open inside, 3Na bind
- phosphorylation by ATP
- shape change and release
- 2K bind and dephosphorylation
- change back and release
3
Q
resting potential
A
- K diff out
- more negative inside so stops
- electrical and diffusion force equal
4
Q
AP definition
A
- neurone depolarises
- reaches threshold
5
Q
Na role in AP
A
- voltage gated channel opens
- Na down electrochemical gradient
- closes at peak
6
Q
K role in AP
A
- voltage gated channel opens
- K out of neurone, repolarising
- hyperpolarising
7
Q
synaptic transmission
A
- AP opens Ca2+ channels
- NT released
- binds to receptors causing opening
- selected ion into post synapse
- NT reuptake
