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Biology
Topic 15
Nervous Control and the Reflex Arc
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Jayden Clauer
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Sensory neurones
carry
nerve impulses
from receptors towards the
central nervous system
Voluntary nervous system
carries
nerve impulses
to body muscles and is under
conscious
control
Motor neurones
carry nerve impulses away from the
central nervous system
towards the
effectors
Central nervous system
is made up of the
brain
and
spinal cord
Autonomic nervous system
carries
nerve impulses
to
glands
, smooth muscles and cardiac muscle
Peripheral nervous system
is made up of pairs of nerves that originate from either the
brain
or
spinal cord
Nervous
links from
receptor
to effector
receptor ->
sensory neurone
->
relay neurone
+ coordinator ->
motor neurone
-> effector
Importance of the reflex arc
reduce/avoid damage to tissues
present from birth so don't have to be learned
very rapid
help with posture/balance