nervous system and the reflex arc

Question 1

what is a synapse

Answer 1

connection between the neurons

Question 2

how does the synapese release chemicals across to the next one

Answer 2

they release an electrical impulse where the chemical diffuses between the gap and recieve another electrical impulse through the neuron till it flows to the other end and restarts

Question 3

what is central nervous system made up of

Answer 3

brain and spinal cord

Question 4

what does central nervous system do

Answer 4

send out orders to the rest of the body

Question 5

how does the cns send information back after interpretation

Answer 5

it send an electrical impulse back by motor neurons which or another type of nerve cell to effectors such as muscle or gland

Question 6

what is a reflex arc

Answer 6

nerve pathway that underlies our unconscious reflexes e.g. move your hand from a hot pan

Question 7

if a stimuli has hit ur hand what happens

Answer 7

once the stimuli has hit the pressure of the stimuli is detected by receptor cells in your skin, then stimulates a sensory neutron that will carry an impulse from your finger up to your spinal cord. inside the spinal cord it will transfer this impulse to a relay neurone. relay neurone passes it on to a motor neurone where travels out to a effector such as you bicep which will contract and move your hand away from the stimuli. between each neurone it will have synapses to pass the chemical to the next neurone

Question 8

what is the role of a sensory neurone

Answer 8

to transfer a signal from a receptor to the cns

Question 9

what is the pathway of a relfex

Answer 9

stimulus~>receptor~>sensory neurone~>relay neurone~>motor neurone~>effector~>response