Transmissions Flashcards
Describe the stages of electrical transmission
Resting state
Activated by stimulus
Action potential produced
Describe resting state
Inside of the cell has a negative charge
Describe activated by stimulus
Inside of the cell becomes positively charges for a split second
Describe action potential produced
The electrical impulse that travels down the axon towards the end of the neuron
what is synaptic transmission?
how neurons communicate with other neurons and parts of the body
what is synapse?
a gap which is formed between neurons and impulses
what are neurotransmitters?
chemicals which diffuse across the synapse
where are neurotransmitters released from?
synaptic vesicles
where are neurotransmitters absorbed?
(on the other side)
post-synaptic receptor site
what does each neurotransmitter have?
its own structure
can only fit into specific receptor sites (lock and key)
what type of effects can neurotransmitters have on a neighbouring neurons?
excitatory
inhibitory
describe the excitatory effect
increase its positive charge
making it more likely to fire
describe the inhibitory effect
increase its negative charge
making it less likely to fire
what causes a vesicle to release a neurotransmitter?
action potential
what happens to some neurotransmitters if they do not get absorbed?
- diffuse away from synapse
- go back to pre-synaptic neuron (reuptake)
is recycled and reused - enzymes break down some of them within the synaptic cleft + some component parts then reused
