Paper 1: Responding To Stimuli

Question 1

What is the point where two neurones meet?

Answer 1

Synapse

Question 2

What are the impulses carried by across the gap?

Answer 2

Neurotransmitters

Question 3

What are the stages of the central nervous systems?

Answer 3

1) electrical nerve impulses reaches end of axon
2) electrical impulses causes chemical neurotransmitters to be released from vesicles in the neurone into gap between neurones
3) neurotransmitters diffuses across the gap and fits into receptors, causing a new electrical impulses in next neurones