Muscle Contraction - Cross Bridge Cycle, Animation.

(USMLE topics) Molecular basis of the sliding filament theory (skeletal muscle contraction) - the cross bridge cycle. This video is available for instant download licensing here : Voice by: Sue Stern ©Alila Medical Media. All rights reserved. Support us on Patreon and get FREE downloads and other great rewards: Muscle contraction is at the basis of all skeletal movements. Skeletal muscles are composed of muscles fibers which in turn are made of repetitive functional units called sarcomeres. Each sarcomere contains many parallel, overlapping thin (actin) and thick (myosin) filaments. The muscle contracts when these filaments slide past each other, resulting in a shortening of the sarcomere and thus the muscle. This is known as the sliding filament theory. Cross-bridge