The Synapse

Question 1

How does the synapse work? 1

Answer 1

Action potential travels down axon of neurone

Question 2

2

Answer 2

Action potential reaches axon terminals.
Ca2+ ion channels open

Question 3

3

Answer 3

Ca2+ ions diffuse into pre-synaptic bulb

Question 4

4

Answer 4

Ca+ ions bind to vesicles containing neurotransmitter vesicles move towards synapse

Question 5

6

Answer 5

Neurotransmitter diffuses across synaptic clef.
Binds to sodium channels on post synaptic membrane

Question 6

5

Answer 6

Vesicles fuse with membrane
Neurotransmitters released into synapse

Question 7

7

Answer 7

Sodium channels open Na+ diffuses in depolarisation