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Question 70

Which substance supplies the immediate usable energy required by contracting muscle cells?

  1. A structural bone mineral
  2. Oxygen used directly as energy
  3. Air stored inside the fibre
  4. ATPCorrect answer

Explanation

ATP transfers usable chemical energy directly to the molecular events of contraction. Oxygen supports processes that replenish energy supplies, but oxygen itself is not the immediate energy currency used by the contractile machinery.

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Question 70: Which substance supplies the immediate usable energy… · Human Body Systems · Questena