5.1.1 structure and function

Question 1

what are the two types of nervous systems in the human body

Answer 1

Central nervous system (CNS) – the brain and spinal cord
Peripheral nervous system (PNS) – all of the nerves in the body

Question 2

what does the nervous system allow us to do

Answer 2

allows them to react and coordinate their behaviour

Question 3

how is information sent out and what is it sent out by

Answer 3

sent out by an electrical pulse and travels through a neurone

Question 4

what is a nerve

Answer 4

a bundle of neurones

Question 5

does a neurone have a cell body

Answer 5

yes it does this is where the nucleus and main organelles are found) and cytoplasmic extensions from this body called axons and dendrites

Question 6

why are axons on a neurone helpful

Answer 6

they are helpful because they have a long length and this enables information to travel quicker and waste less time as it doesn’t have to pass through as many cells

Question 7

how do impulses go through a axon

Answer 7

insulated by a fatty myelin sheath with small uninsulated sections along it (called nodes)

Question 8

SRCER

Answer 8

stimulus → receptor → coordinator → effector → response

Question 9

what do the CNS do

Answer 9

The CNS coordinates the response of effectors which may be muscles contracting or glands secreting hormones

Question 10

how do receptors communicate with the CNS

Answer 10

with electrical impulses