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HMS, BM EQ-Bank 927 MC

During an archery competition, an athlete's hand accidentally touches a sharp edge. The immediate withdrawal of their hand is primarily controlled by:

  1. Motor neurons in the brain
  2. Sensory neurons in the skin
  3. Voluntary muscle contractions
  4. A spinal reflex pathway
Show Answers Only

\(D\)

Show Worked Solution
  • D is correct: The immediate withdrawal response from a painful stimulus is a reflex action controlled by the spinal cord without requiring brain processing.

Other Options:

  • A is incorrect: Brain motor neurons control voluntary movements, not immediate reflexes.
  • B is incorrect: Sensory neurons detect the stimulus but don’t control the withdrawal response.
  • C is incorrect: The withdrawal is involuntary, not a voluntary muscle contraction.