Question

what forms the cross - bridges during muscle contraction? myosin heads binding to actin troponin groups binding to tropomyosin individual actin molecules binding to other actin molecules myosin tails binding to actin need help? review these concept resources. rate your confidence to submit your answer. high medium low reading © 2025 mcgraw hill. all rights reserved. privacy center terms of use

Explanation:

During muscle contraction, cross - bridges are formed when myosin heads bind to actin filaments. Troponin - tropomyosin interaction regulates muscle contraction but does not form cross - bridges. Actin - actin binding is not related to cross - bridge formation, and myosin tails do not bind to actin to form cross - bridges.

Answer:

myosin heads binding to actin