Question

Name the filaments that form the cross-bridges during muscle contraction.

Answer 1

• Cross-bridge cycling between actin and myosin is responsible for muscular contraction.
• The power stroke occurs when myosin changes its shape, pulling the thin filaments towards the middle of the sarcomere which causes sarcomere to shorten in muscular contraction. Hence, actin and myosin are the filaments that form the cross-bridges during muscle contraction.

So, the correct answer is ' actin and myosin'.