part 1 of sliding filament model explaining muscle contraction at the molecular level. Muscle shortening occurs due to the sliding of actin (thin) filaments past myosin (thick) filaments, rather than the filaments shortening themselves. This sliding is powered by cyclical interactions between these filaments, driven by the hydrolysis of ATP. | Medicine E-Library

Which theory explains muscle contraction? A) Sliding filament theory B) Cross-bridge theory C) Muscle spindle theory D) T-tubule theory Drop your answer in the comments below 👇👇 👉 EXPLANATION: The correct answer is A) Sliding filament theory. Here’s why the sliding filament theory explains muscle contraction: The sliding filament theory describes the process by which muscles contract. According to this theory, muscle fibers contract by the sliding of thin (actin) and thick (myosin) filaments