The document summarizes the parasympathetic nervous system. It is the involuntary nervous system that slows the heart rate, increases intestinal and glandular activity, and relaxes sphincter muscles. Together with the sympathetic nervous system, it constitutes the autonomic nervous system. The parasympathetic system works to return the body to homeostasis after experiencing stress or pain by slowing the heart rate and relaxing muscles. It is consistently active at a low level.

2. The part of the involuntary
nervous system that serves to
slow the heart rate, increase
intestinal and glandular
activity, and relax the
sphincter muscles. The
parasympathetic nervous
system, together with the
sympathetic nervous
system, constitutes the
autonomic nervous system.

3. Like other parts of the nervous
system, the sympathetic nervous
system operates through a series
of interconnected neurons:
a. isomerization of retinal.
b. bipolar neurons in the retina.
c. production of new proteins in
the lens.
d. constriction of the pupil.
e. dilation of the pupil.

4. The Parasympathetic system is…
O The branch of the Autonomic Nervous
System (ANS)
O Responsible for the body’s ability to
recuperate and return to a balanced
state (known as "homeostasis") after
experiencing pain or stress.
O The Sympathetic System is also known
as the "fight or flight" response
O Also called ‘’relax and renew’’
O Conserves energy as it slows the heart
rate, increases intestinal and gland
activity, and relaxes sphincter muscles
in the gastrointestinal tract.

6. When the sympathetic system
activates in response to some
sort of stressor, the
parasympathetic reacts in
turn to bring the body back to
a state of equilibrium. The
Parasympathetic system is
consistently active at a low
level.

7. The StressEraser personal
biofeedback device makes it simple
and easy to activate your
parasympathetic nervous system
for natural stress relief.

8. Integrants

Yamil Tobías Mtz 1°B
Eduardo Valenzuela Padilla 1°D
Cecilia Valdez Báez 1°E
Ana Silvia Villarreal Vega 1°C