Parasympathetic

Nervous System

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.

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.

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" responseO 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.

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.

The StressEraser personal biofeedback device makes it simple and easy to

activate your parasympathetic nervous system for natural stress

relief.

Yamil Tobías Mtz 1°B Eduardo Valenzuela Padilla

1°D Cecilia Valdez Báez 1°E Ana Silvia Villarreal Vega 1°C

Integrants

Miss Silvia Vega