Neural Control And Coordination Ques 31
31. 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
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Answer : d
Hints & Solutions
(d) 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.
BETA
