15.5 - Transmission Across a Synapse

Question 1

What is synaptic transmission?

Answer 1

Process of nerve impulse transmiting across a synapse

Question 2

What are the key steps in synaptic transmission?

Answer 2

Action potential arrives

Question 3

What happens when an action potential arrives at the presynaptic knob?

Answer 3

Ca2+ channels open

Question 4

What happens when Ca2+ flows into the presynaptic knob?

Answer 4

Vesicles move and fuse with membrane

Question 5

How are neurotransmitters released?

Answer 5

Exocytosis

Question 6

What happens when neurotransmitters bind to receptors?

Answer 6

Receptors change shape

Question 7

What happens when Na+ channels open in the postsynaptic membrane?

Answer 7

Depolarisation

Question 8

What is a cholinergic synapse?

Answer 8

Synapse using acetylcholine (ACh)

Question 9

What happens after ACh binds to receptors?

Answer 9

ACh broken down by acetylcholinesterase

Question 10

Why is it important to remove neurotransmitters?

Answer 10

Prevent continuous stimulation