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THE SOMATIC AND AUTONOMIC NERVOUS SYSTEMS (AUTONOMIC SUBDIVISION (dual…
THE SOMATIC AND AUTONOMIC NERVOUS SYSTEMS
SOMATIC SUBDIVISION
associated
perception
external stimuli
and motor activity
receives information
from the body's various sensory organs
sends responses
to the somatic effectors
or skeletal muscles
which contract voluntarily
or involuntarily
as immediate reflex arcs
AUTONOMIC SUBDIVISION
regulates function of organs and systems
in an involuntary manner
the autonomic nervous system
is continuously receiving information
from internal organs
via nerves
from internal receptors
to detect critical condictions
involuntary messages
originate in several regions of the CNS
are sent
to various autonomic effectors
throughout the body
and heart rate
respiratory rate
and pupil dilation
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dual network
subdivided
sympathetic branch
associated
with situations
of stress and increased
energy demand
and it leads
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parasympathetic branch
associated actions
such as relaxation
tranquillity
and low energy expenditure
are antagonistic in nature