Question

what are the functions of the following. (i) central nervous system (CNS) (ii) peripheral nervous (PNS) (iii) autonomic nervous system (ANS)​

Answer 1

Autonomous Nervous system

1. sympathetic system
2. parasympathetic system

1)sympathetic system:

• The pupil in the eye dilates
• production of saliva decreases
• Trachea expands
• Gastric activities slow down.
• Glycogen is converted to glucose
• peristalsis in the intestine slows down
• production of adrenaline increases
• Urinary bladder regains normal state

2) parasympathetic system:

• The pupil in the eye contracts
• production of saliva increases
• Trachea contracts
• Heart beat becomes normal
• Gastric activities become normal
• Glucose is converted to glycogen.
• Peristalsis in the intestine becomes normal
• production of adrenaline decreases
• Urinary bladder contracts

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