neurons, synapses, neurotransmitters, action potential

Question 1

describe synaptic transmission in 5 steps

Answer 1

1 - action potential comes down axon to terminal
2 - vesicles full of NT move to edge and release NT
3 - NT drifts across gap and binds to receptor
4 - when enough are filled a new AP can begin
5. - any excess NT are reabsorbed

Question 2

describe action potentials in 6 steps

Answer 2

1 - when neurone is at rest it is negatively charged
2 - when neurones is stimulated, it must reach -55mv for the AP to begin
3 - begins to get less negative inside called depolarised
4 - at +40 the AP fires
5 - it then does through repolarisation and becomes negative again
6 - finally goes through hyperpolarization where it is extra negative before going back to resting at -70

Question 3

GABA

Answer 3

calming

Question 4

norepinephrine

Answer 4

prepares for flight or fight

Question 5

acetylcholine

Answer 5

memory and learning

Question 6

dopamine

Answer 6

pleasure

Question 7

glutamate

Answer 7

cognitive functioning

Question 8

serotonin

Answer 8

happiness