nervous system

Question 1

what 2 bits is the nervous system composed of?

Answer 1

cns
receptors and effectors

Question 2

why is the nervous system important for humans?

Answer 2

humans can react to surroundings and co ordinate their behaviour

Question 3

what sequence of events describes how the nervous system works?

Answer 3

stimulus
receptor
co ordination centre
effector
response

Question 4

what is the difference between sensory and motor neurones?

Answer 4

sensory neurones carry electrical impulses from receptors to co ordination centre
motor neurones carry electrical impulses from co ordination centre to effectors

Question 5

how does a stimulus lead to a response being carried out by the body?

Answer 5

stimulus is converted into electrical impulse by receptors
electrical impulse passes along sensory neurones to cns
cns co ordinates a response and electrical impulse is sent along motor neurones to effectors which carry out response

Question 6

what are effectors and how do they respond?

Answer 6

muscles
contracting
glands
secreting hormones