Reflexes + Electrical Impulses at Synapses Flashcards
What are reflex actions
actions which don’t use the conscious part of the brain
what is the reflex arc
stimulus –> receptor –> coordinator–> effector –> response
Where are synapses located
between neurones
What is the 1st stage of an electrical impulse travelling across a synapse
the electrical impulse moves down the neurone/axon
What happens in the synapse vesicles when the electrical impulse arrives (2nd step of process)
it triggers nerve endings to release chemical called NEUROTRANSMITTERS from the synapse vesicles
What happens to the neurotransmitters in the 3rd step of the process
neurotransmitters diffuse across the synapse and bind with receptor molecules on membrane of the next neurone
What happens once neurotransmitters bind with receptors on the next neurones membrane - What is the 4th step?
new electrical impulse is created
neurotransmitters stimulate 2nd neurone to transmit electrical impulse