In striated muscle, the initiating step for myofilament sliding is

Acalcium ions in the sarcoplasm bind to troponin
Bmyosin ATPase activity increases leading to ATP breakdown
Cmyosin binds to actin
Dcross-bridge binds to actin

Correct answer: A. calcium ions in the sarcoplasm bind to troponin

Calcium ions in the sarcoplasm bind to troponin, which is the initiating step for myofilament sliding.

Free PDF sample

Get NEET Biology MCQs as a chapter-wise PDF.

Join early access for a free MCQ sample with answers and NCERT-aligned explanations.

Get free PDF

More Muscle contraction and skeleton MCQs