Which of the following is not an effect produced by parasympathetic stimulation?

Dilation of the pupils

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Increased saliva production

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Increased stomach activity

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Constriction of the bronchi

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Solution

The correct option is A Dilation of the pupils
The parasympathetic nervous system decreases respiration and heart rate and increases digestion. Stimulation of the parasympathetic nervous systems results in the construction of pupils. Decrease heart rate and blood pressure.
So, the correct option is 'Dilation of pupil'.

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