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ICSE Class 10 Biology Question 11 of 21

Multiple-Choice Questions — Question 11

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Question

Question 11

Given below are some common reflexes in humans.

i. Quick closing of the eyelids when a strong beam of light is flashed across.

ii. Apply brakes to your vehicle if anything suddenly comes in front.

iii. Playing a musical instrument.

iv. Coughing reflex, when the food is swallowed, enters the windpipe.

The conditioned reflexes are:

  1. i and ii
  2. ii and iii
  3. iii and iv
  4. i and iv
Answer

ii and iii

Reason — Quick closing of the eyelids when a strong beam of light is flashed across and coughing reflex, when the food is swallowed, enters the windpipe are natural or inborn reflexes. Playing a musical instrument and applying brakes are learnt by practice and thus they are conditioned reflexes.