A) Contraction of hair muscles
B) Stimulation of sweat glands
C) Acceleration of heart beat
D) Constriction of pupil
Correct Answer: D
Solution :[d] Sometimes called the rest and digest system, the parasympathetic system conserves energy as it slows the heart rate, increases intestinal and gland activity, and relaxes sphincter muscles in the gastrointestinal tract.
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