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Write down the action of the parasympathetic and the sympathetic system in the following organs.

Organ Parasympathetic Sympathetic
Eye ....... (a) ........ ...... (b) .....
Heart ...... (c) .......... (d)

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a) Pupil constricts. 

b) Pupil dilates. 

c) Heartbeat becomes normal. 

d) Heartbeat increases.

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