Question

Which regions best identifies where myosin would have maximum cross-bridge access to actin?

Answer 1

Region between 2 and 3

Explanation:

Muscles consists of two protein filaments:a thick filament which is made up of protein myosin whereas a thin filament is made up of protein actin

• During contraction,thin filaments slide past the thick filament resulting in shortening of sarcomere
• Myosin thick filaments grab on to the actin filaments by forming cross bridges
• The thick filaments pull the thin filaments past them making the sarcomere shorter
• The region between points 2 and 3 includes the area of overlap between thin and thick filaments