14.3 reflex arc

Question 1

what are the 7 components that makes up an reflex arc?

Answer 1

1- stimulus
2- receptor
3- sensory neurone
4- coordinator
5- motor neurone
6- effector
7- response

Question 2

what does the sensory neurone do?

Answer 2

passes nerve impulse to spinal cord

Question 3

what does the coordinator do?

Answer 3

formulates response to stimuli & links sensory neurone to motor neurone

Question 4

what does the motor neurone do?

Answer 4

carries impulse to the effector from the spinal cord

Question 5

why are reflex arcs important? (3)

Answer 5

1- fast
- short neurone pathway with 1-2 synapses
- absence of decision-making process

2- involuntary
- frees up brain to carry out more complex responses

3- protects from harm