What are the roles of the parasympathetic nervous system and sympathetic nervous system in maintaining everyday homeostasis?

The parasympathetic nervous system and sympathetic nervous system play opposite roles

Explanation:

To ensure a stable internal environment (homeostasis) is achieved, the parasympathetic nervous system (PNS) and sympathetic nervous system (SNS) play OPPOSITE roles.

The PNS dominate during relaxed periods and stimulates the

- liver to break down glycogen

- constriction of bladder to pass out urine

- increases heartbeat

- dilate pupils etc

The SNS, in contrast dominate in times of emergency or stressful periods and do the EXACT opposite of the processes mentioned above.

Thus homeostasis is maintained

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