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SYMPATHETIC SYSTEM
SYMPATHETIC SYSTEM
6
Anatomy
Beginner
08/09/2016

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Term
Sympathetic Nervous System

What does it do?
Definition
1. Increase heart & respiration rates
2. Increase flood flow to brain & skeletal muscles
3. Contracts sphincter muscles in the digestive & urinary tracts
4. Inhibits gland secretion - with exception of sweat glands where perspiration increases
Term
Sympathetic Nervous System

Preganglionic cells of the sympathetic system are in the lateral horns of the spinal cord. What numbers of the spine?
Definition
T1-T12 & L1 & L2
Term
Sympathetic Nervous System

are the postganglionic cells?
Definition
In the sympathetic chain, which runs alongside the length of the spine.
Also, in three separate ganglia in the abdomen
Term
Parasympathetic Nervous System

What does it do?
Definition
1. Reduces hear and respiration rates
2. Relaxes sphincters
3. Increases gland secretions and smooth muscle contraction of digestion, elimination and sex.
4. Increases blood flow to penis and clitoris
Term
Parasympathetic Nervous System

Where is the preganglionic cells of the parasympathetic system located?
Definition
Brain Stem & the Sacral section of the spinal cord.
Term
Parasympathetic Nervous System

How does the preganglionic cells of the parasympathetic work to get the impulses to the organs?
Definition
They send axons through cranial and sacral nerves to postganglionic cells, located in numerous peripheral (PNS) ganglia directly adjacent to their target organs.
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