5.1.2 Synapses

Question 1

What are the roles of synapses?

Answer 1

• Unidirectional transmission.
• Can cause multiple responses from one stimulus.
• Can receive multiple stimuli for one response.

Question 2

Describe spatial summation.

Answer 2

• Multiple neurones connected to one synapse.

Question 3

What happens to the postsynaptic neurone when two presynaptic neurones release neurotransmitters?

Answer 3

• New action potential in postsynaptic neurone.

Question 4

What happens to the postsynaptic neurone when one presynaptic neurone releases neurotransmitters?

Answer 4

• No new action potential is generated in postsynaptic neurone.

Question 5

In temporal summation, what happens if there is a high frequency of action potential?

Answer 5

• New action potential generated in the postsynaptic neurone.

Question 6

In temporal summation, what happens if there is a low frequency of action potential?

Answer 6

• No new action potential generated in the postsynaptic neurone.