Synaptic Clefts and Neurotransmitters

Question 1

Define the term ‘synaptic cleft’

Answer 1

spaces between the axon ending of one neuron and a dendrite of another

Question 2

Neuron before the synaptic cleft is known as the…

Answer 2

presynaptic neuron

Question 3

Neurone after the synaptic cleft is known as the…

Answer 3

postsynaptic neuron

Question 4

By what substance are nerve impulses relayed through the synaptic cleft?

Answer 4

neurotransmitters

Question 5

Give two examples of a neurotransmitter

Answer 5

acetylcholine and norepinephrine

Question 6

An impulse arrives at a presynaptic neuron it then…

Answer 6

stimulates vesicles in the synaptic terminal

Question 7

After the vesicles have moved to a synaptic terminal’s surface, what happens next?

Answer 7

the vesicles fuse to its membrane and forms openings and discharges its contents into the synaptic cleft

Question 8

What happens to the neurotransmitter after being released into the synaptic cleft?

Answer 8

it binds to receptor molecules on the membrane of the postsynaptic dendrite