Approximately how far does a thin filament move toward the M-line during a single power stroke of the cross-bridge cycle?

1. During the power stroke, the myosin head pivots after releasing inorganic phosphate, pulling the actin filament. 2. This pull moves the thin filament approximately 10 nm toward the M-line in one stroke. 3. Many repeated cycles across a sarcomere are needed to produce the overall shortening seen in contraction. 4. 1.2 μm is the diameter of a myofibril, a far larger scale than a single power stroke. 5. 2 μm is the length of a whole sarcomere, again much larger than the distance one power stroke covers. 6. 100 nm overstates the real power-stroke distance roughly tenfold. _Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 10 "Muscle Tissue", section 10.3, p. 417_