GATE 2021 XH5 – Question 61

Biological and Evolutionary Basis of Behaviour · Nervous System and Brain: Structures of the brain and their functions, neurons, neural impulse, synaptic transmission, neurotransmitters, hemispheric lateralization · 2 marks · Multiple select

Which changes accompany sympathetic nervous-system activation?

Inhibited salivation
Increased heart rate
Inhibited digestion
Constricted pupils

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Show answer and explanation

Correct answer: (A) Inhibited salivation; (B) Increased heart rate; (C) Inhibited digestion

Explanation

Sympathetic activation prepares the body for action: heart rate rises and digestive activity and salivation decrease. Thus A,B,C fit the standard pattern. Pupils generally dilate rather than constrict, so D is excluded. These coordinated changes redirect resources toward immediate activity.

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