Question

during muscle contraction, myosin heads bind actin which results in the formation of _.
o t - tubules
o cross - bridges
o action potentials

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Explanation:

During muscle contraction, myosin heads bind to actin filaments. This binding forms cross - bridges which are crucial for the sliding filament mechanism of muscle contraction. T - tubules are involved in the transmission of action potentials in muscle cells and action potentials are electrical signals, not formed by the binding of myosin and actin.

Answer:

B. cross - bridges