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One function of parasympathetic nervous system is [1990]
  • a)
    contraction of hair muscles
  • b)
    stimulation of sweat glands
  • c)
    acceleration of heart beat
  • d)
    constriction of pupil
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
One function of parasympathetic nervous system is [1990]a)contraction ...
Sympathetic system prepares the body for stress or emergency conditions while parasympathetic system is associated with the period of rest. So when one faces the stress or emergency conditions sympathetic system enlarges the pupil to allow more light in the eye while during rest parasympathetic nervous system constricts  the pupil to its normal condition.
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Most Upvoted Answer
One function of parasympathetic nervous system is [1990]a)contraction ...
The sympathetic and parasympathetic nervous system are antagonist that is they are opposite to each other..
the sympathetic nervous system gets activated during adrenaline rush! after the episode of flight or fright...or fight...to bring back the body to it's original senses the parasympathetic nervous system acts..
in case of sympathetic nervous system it dilates the pupil of the eye whereas parasympathetic nervous system constructs the pupil...
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One function of parasympathetic nervous system is [1990]a)contraction of hair musclesb)stimulation of sweat glandsc)acceleration of heart beatd)constriction of pupilCorrect answer is option 'D'. Can you explain this answer?
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