Question

as crossbridges form and a skeletal muscle fiber contracts, in which direction are myofilaments moving?

Answer 1

Step-by-step explanation:

During muscle contraction, the heads of myosin myofilaments quickly bind and release in a ratcheting fashion, pulling themselves along the actin myofilament. At the level of the sliding filament model, expansion and contraction only occurs within the I and H-bands.