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Peripheral Nervous System

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Aviva Okeson-Haberman

on 3 September 2013

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Transcript of Peripheral Nervous System

peripheral nervous system
Aviva Okeson-Haberman
Cass Malcolm
Roxy Kraber
Dakota Bowen
Chad Dunn
Sierra Shields

Contains all portions of the nervous system outside the brain, and spinal cord
Handles the central nervous system’s input and output

Sens ry Nerves
Carry messages from special receptors to the spinal cord
Mot r Nerves
carry orders from the central nervous system
to muscles, glands, internal organs
Enable us to move
nervous system
Autonomic Nervous System
Nerv us System
nervous system
Definition: The subdivision of the peripheral nervous system that regulates
the internal organs and glands.
Involuntary most of the time; some people can be trained to control it.
The autonomic nervous system is important for:
Fight or Flight
Rest and Digest
In the skin
Around blood vessels
In the eye
It regulates the functioning of blood vessels, glands, and internal organs such
as the bladder, stomach, and heart.
conserves energy by slowing the heart rate and limiting the “flight or fight” response
while maintaining efficiency
constricts the pupils
strongly simulates salivation
stimulates glands around the body
activates digestion and inhibits glucose released by liver
constricts the bronchial tubes in the lungs
contracts the bladder wall
stimulates the sex organs
sympathetic nervous system
mobilizes bodily resources and increases the output of energy during emotion and stress
increases epinephrine
Norepinephrine secretion
dilates pupils
weakly stimulates salivation
stimulates sweat glands
Dilates bronchial tubes in lungs
Relaxes bladder wall

decreases urine volume
Inhibits digestion
heart beat
stimulates glucose
release by liver

Stimulates ejaculation
in males
Cranial Nerves

Spinal Nerves
skeletal nervous system
consists of nerves that are connected to sensory receptors
3 parts
Association Nerves
Carry info. to brain stem
ex. smell, vision, taste, etc.
peripheral nerves that carry sensory info. into spinal cord and motor commands
Associated Nerves
integrates sensory input and motor output
reflex arc: link between a sensory input and specific motor output
The End
Full transcript