Reflexes + Electrical Impulses at Synapses

Question 1

What are reflex actions

Answer 1

actions which don’t use the conscious part of the brain

Question 1

what is the reflex arc

Answer 1

stimulus –> receptor –> coordinator–> effector –> response

Question 2

Where are synapses located

Answer 2

between neurones

Question 3

What is the 1st stage of an electrical impulse travelling across a synapse

Answer 3

the electrical impulse moves down the neurone/axon

Question 4

What happens in the synapse vesicles when the electrical impulse arrives (2nd step of process)

Answer 4

it triggers nerve endings to release chemical called NEUROTRANSMITTERS from the synapse vesicles

Question 5

What happens to the neurotransmitters in the 3rd step of the process

Answer 5

neurotransmitters diffuse across the synapse and bind with receptor molecules on membrane of the next neurone

Question 6

What happens once neurotransmitters bind with receptors on the next neurones membrane - What is the 4th step?

Answer 6

new electrical impulse is created
neurotransmitters stimulate 2nd neurone to transmit electrical impulse