NEET Zoology Muscle Contraction Assertion Reason Question
Assertion (A): The release of calcium ions into the sarcoplasm triggers muscle contraction.
Reason (R): Calcium ions bind to a subunit of troponin on actin filaments, exposing active sites for myosin binding.
Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is not the correct explanation of A.
A is true but R is false.
A is false but R is true.
Correct Answer
Detailed Explanation
According to the provided context, the release of calcium ions into the sarcoplasm leads to binding with troponin, which exposes active sites for myosin, thus explaining muscle contraction.
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