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sympathetic nervous system (SNS)

The sympathetic system is characterized by:
1. This consists of preganglionic neurons that originate in the thoracic and lumbar portions
2. Preganglionic axons are short
3. Postganglionic axons are long
4. Preganglionic axons synapse in paravertebral ganglia, prevertebral and terminals.
5. Its nodes are close to the central nervous system and away from the effector
6. Preganglionic axons are cholinergic (ACh used in the synapse)
7. Postganglionic axons are mostly adrenergic (using noradrenaline in the synapse). Eg sweat glands, blood vessels, muscles, skin and genital organs.
8. Responds to emergencies, preferencies the activity of certain organs at the expense of others. For example: In an assault situation, blood is in greater proportion to the brain and muscles instead of flushing the digestive system and kidneys.

8.