5.1.1 structure and function Flashcards

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1
Q

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

A

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

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2
Q

what does the nervous system allow us to do

A

allows them to react and coordinate their behaviour

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3
Q

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

A

sent out by an electrical pulse and travels through a neurone

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4
Q

what is a nerve

A

a bundle of neurones

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5
Q

does a neurone have a cell body

A

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

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6
Q

why are axons on a neurone helpful

A

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

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7
Q

how do impulses go through a axon

A

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

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8
Q

SRCER

A

stimulus → receptor → coordinator → effector → response

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9
Q

what do the CNS do

A

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

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10
Q

how do receptors communicate with the CNS

A

with electrical impulses

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