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Question 13154
NEET Biology · Medium

Locomotion and Movement: Excitation-Contraction MCQ

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Excitation-ContractionMediumQuestion 13154

Question

The role of calcium in contraction is best described as:

  1. A
    Exposing actin binding sites by acting through troponin
    Correct
  2. B
    Breaking peptide bonds in myosin
  3. C
    Forming bone salts
  4. D
    Destroying ATP permanently

Correct answer

Exposing actin binding sites by acting through troponin

Explanation

Calcium binds troponin, shifts tropomyosin, and permits cross-bridge formation.

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