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3 Phases of Muscle Twitch
1) Latent Period - AP moves through Sarcolemma, causing Ca2+ release from SR
2) Contraction Phase - Ca2+ binds, cross-bridge formation, power stroke, tension builds to peak
3) Relaxation Phase - Ca2+ actively transported back into SR, Ca2+ levels fall, active sites are covered, tension falls to resting levels.
2) Contraction Phase - Ca2+ binds, cross-bridge formation, power stroke, tension builds to peak
3) Relaxation Phase - Ca2+ actively transported back into SR, Ca2+ levels fall, active sites are covered, tension falls to resting levels.
