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Psychology paper 2
biopsych
the nervous system
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The nervous system
Specialised
network of
cells
in the human body and our
primary
internal
communication
system.
Based on
electrical
and
chemical
signals
Functions of the nervous system
to
collect
,
process
and respond to information in the
environment
to
co-ordinate
the working of different
organs
and
cells
in the body
Subsystems of the nervous system
Central nervous system
Peripheral nervous system
The central nervous system
made up of the
brain
and the
spinal cord
brain = centre of all
conscious awareness.
brain's outer layer =
cerebral cortex
(
3mm
thick)
the brain is
highly
developed in humans -
higher
mental
functions
two
hemispheres
spinal cord
is an
extension
of the brain
passes
messages
to and from the
brain
and
connects
nerves
to
PNS
responsible for
reflex
actions
The peripheral nervous system
transmits
messages via
neurons
to and from the
central
nervous
system
autonomic
nervous system - governs
vital
functions in the body (
breathing
,
heart
rate
,
digestion
)
somatic nervous system - governs
muscle
movement and
receives
information from
sensory
receptors