Autonomic Nervous System

1. AUTONOMIC
NERVOUS SYSTEM
BY: Dr. AKANSHA TYAGI

2. NERVOUS SYSTEM
CNS PNS
Spinal
cord
Brain SNSANS
ParasympatheticSympathetic

4. Autonomic Nervous System

7. SYMPATHETIC STIMULATION
• Fight or flight response
• Release adrenaline and non adrenaline
• Increase heart rate and blood pressure
• Dilation of blood vessels
• Increase blood flow to skeletal muscles
• Accelerate lung function
• Dilates pupil-appearance of excitement & alertness
• Stimulate sweat glands
• Inhibits digestive functions
• Relax bladder
• Release glucose stores from liver
• Inhibit flow of saliva

8. PARASYMPATHETIC STIMULATION
• Rest and digest system
• Calms body to conserve and maintain energy
• Increase saliva production
• Constrict pupils- appearance of sleepiness
• Constrict airways
• Constricts bronchi
• Lowers heart rate, blood pressure and breathing rate
• Stimulates peristalsis and secretion
• Stimulates release of bile
• Increases blood flow to GI tract
• Decreases blood flow to skeletal muscle
• Kidneys begin to function - urination

13. NEURON

14. • Main function of DENDRITES is to receive
incoming signals. Dendrites are the structures
on the neuron that receive electrical
messages.
• AXON conducts electrical impulses known as
action potentials, away from the nerve cell
body.

15. • Sensory (Afferent) division: Nerve fibers that
carry information TO the central nervous
system.
• Motor (Efferent) division: Nerve fibers that
carry impulses AWAY FROM central nervous
system.