Nerves

Question 1

3 features of a synapse

Answer 1

• unidirectionality
  summatian
  inhabitation

Question 2

Explain unidirectionality of a synapse

Answer 2

Synapses can only pass info from presynaptic membrane to postsynaptic membrane
Released from pre and post have specific protein receptors to attach it

Question 3

Explain summation

Answer 3

So low frequency AP can lead to release of insufficient conc of neurotransmitter to trigger new ap
So spatial - number of diff presynaptic neurones together release enough neurotransmitter to exceed threshold value of post therefore trigger ap

Temporal - single presynap release NT many times over short period. If conc of NT exceeds threshold new ap is triggered

Question 4

Explain inhibitation

Answer 4

Pre releases a