The video provides an easy and convenient presentation about the mechanisms and structures that bring about the contraction of Skeletal Muscle Fiber. You do not want to miss out on this one! Timeline: 00:04 Excitation Contraction Coupling 00:28 Action Potential and T-Tubules 00:52 Sarcoplasmic Reticulum 01:22 The release of Calcium 01:50 Contraction of MUscle Fibers