Biopsychology - Neurones and synapses Flashcards
1
Q
what are the three neurones
A
- sensory
- relay
- motor
2
Q
what is the structure of a neuron
A
- myelin sheath
- nodes of Ranvier
- axon
- cell body
- nucleus
- dendrites
- dendron
3
Q
what is a synapse
A
- junction where the two neurones meet
4
Q
what is the structure of a synapse
A
- presynaptic knob
- synaptic cleft
- postsynaptic membrane
5
Q
how is a neurotransmitter transmitted across a synapse
A
- impulse arrives at the end of the presynaptic neurone
- vesicles fuse with pre membrane and releases NT into synaptic cleft
- NT diffuse across synaptic cleft
- NT attach to receptors on postsynaptic membrane
- triggers an impulse that travels along post neurone
- NT are recycled or destroyed
6
Q
what are neurotransmitters
A
chemicals that diffuse across the synapse to the next neuron
- acetylcholine
