Joe Pistack MS/ED
response-the body’s way of
unconsciously and automatically making
decisions and carrying them out for you.
autonomic nervous system-is part of the
peripheral nervous system that supplies
motor activity to the visceral effector
organs, glands, smooth muscles within the
organs and the heart.
two divisions of the ANS are:
Innervation a single organ receives
nerve fibers from both divisions of the ANS
nervous system- is activated
during periods of stress or times when a
person feels threatened.
the “fight or flight” response.
you to either confront (fight)
or remove yourself from the threatening
Sympathetic nervous system is activated during
periods of stress, normally short-lived
Bronchial tubes dilate(increase airflow)
Iris of the eye dilates (pupils enlarge)
Blood vessels constrict
Sweat glands stimulated
Inhibited intestinal mobility
Adrenal medulla stimulates secretion of
epinephrine and norepinephrine
Salivary glands stimulate thick secretions
nervous system-most active
during quiet, non-stressful conditions.
a calming effect on the body.
an important role in the regulation of
digestion and reproductive function.
to as “feed and breed” or resting
parasympathetic system is activated in
situations that are perceived hopeless and
where “fight or flight” seems futile.
are the opposite of sympathetic
reaction to a more restful situation.
Ex. Nice spring day, sitting under a tree.
Bronchial tubes constrict
Salivary glands are stimulated with a watery
Increased motility and secretion of the
that can effect the parasympathetic
nervous system may be stimulation of the
vagus nerve, diagnostic testing that may
stimulate a parasympathetic response. Ex.
massive parasympathetic response may
result in uncontrolled urination or
There is a decrease in the speed of nerve
Decrease in reflexes.
Less efficient sympathetic nervous system
response may cause transient hypotension and
Decline in nerve activity supplying changes in
pupillary response and reactivity.
Decrease in the cranial nerves mediating taste