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

Pupil dilation

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Increased saliva

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Increased stomach activity

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Constriction of bronchi

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Solution

The correct option is A Pupil dilation
Dilation of the pupil is the function of the sympathetic nervous system. Parasympathetic stimulation causes: slowing down of the heartbeat; lowering of blood pressure; constriction of the pupils; decreased heart rate; salivation increase; peristalsis of the GI tract.

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