Question

Tabulate the differences between sympathetic and parasympathetic neural system?

Answer 1

	Sympathetic Neural system (SNS)	Parasympathetic Neural system (PNS)
1.	SNS originates in the thoracic and lumbar region of the spinal cord.	PNS originates in the cranial region of the brain and the sacral region of the spinal cord.
2.	Sympathetic ganglia are linked up to form a chain.	Its ganglia remain isolated.
3.	Preganglionic fibres are short and the postganglionic fibres are long.	Preganglionic fibres are long and the postganglionic fibres are short.
4.	Noradrenaline is produced at the terminal ends of the postganglionic fibres at the effector organs. Hence the system is adrenergic.	Acetylcholine is produced at the terminal ends of the postganglionic fibres at the effector organs. Hence the system is cholinergic.
5.	Active during stressful conditions preparing the body to face them.	Active during relaxing times restoring normal activity after a stress.
6.	The overall effect is excitatory and stimulating.	The overall effect is inhibitory.
7.	It is considered as the flight or fight system.	It is considered as ‘The Rest and Digest System’ or ‘The Feed and Breed System’.