synaptic and electrical transmission

Question 1

what is a synaptic transmission

Answer 1

• process by which neurons communicate with each other by sending chemical messengers (neutrotrasmitters across the gap)

Question 2

process of synaptic transmission

Answer 2

1- action potential causes synaptic vessels to move towards the pre synaptic membrane

2- synaptic vesicles merge with cell membrane , release neurotransmitters into synaptic cleft

3 - nt diffuse across synapse

4 - neurotransmitters bind to receptors on the post synaptic membrane

5- nt can be excitatory or inhibitory

6- excitatory - increase chance of action potential
6.2- inhibitory - decrease chance of action potential

7- left over neurotransmitters in synaptic cleft, either diffuse away, taken back into pre synaptic membrane or are broken down by enzymes

Question 3

difference between excitatory and inhibitory

Answer 3

-excitatory nt

• ns ‘on switch’
  -increases likelihood of an action
• e.g adrenalin

inhibitory -
- ns ‘off switch’
- decreases likelyhood of an action
- e.g serotonin