guyton chapter 6 part 2 of 3

0:00 Introduction 0:22 Interaction of Myosin, Actin & Calcium ions 0:55 Activation of Actin Filament by Ca ions 2:15 Walk Along Theory 4:53 Energy comes from ATP 5:18 Fenn effect 8:53 Overlapping determine tension developed 17:18 Relation of velocity of contraction to load 17:45 Energetics of muscle contraction 18:12 Step of contractions utilizing energy 19:14 Sources of energy 21:24 Efficiency of muscle contraction