KIN 205 Lecture Notes - Lecture 1: Myosin Light Chain, Rectus Femoris Muscle, Calcium Atpase
13 Dec 2017
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Primarily to generate force (concentric, eccentric, unchanging length) Aka shortening, lengthening (isotonic) or static (isometric) Can generate much more force with lengthening vs shortening: function --- fuel storage, skeletal muscle 30-40% of body mass, therefore major site for carbs (glycogen), lipids (triglycerides0 and proteins. * rate of protein synthesis = rate of protein degradation to maintain muscle mass. during hypertrophy, rate of synthesis > breakdown therefore net increase in protein. During aging and disease net decrease, atrophy, breakdown > synthesis: temperature regulation shivering thermogenesis via contractions. Recall overall efficiency is 20%, with the balane of energy given off as heat. Non-shivering thermos heat prod without muscle contraction: force absorbers protects skeleton and internal organs. Recall a. a. together into polypepties into structures enzymes, transporters, channels, Into structures or complexes like thin and thick filaments, z disks,, Protein isoforms highler related proteins that possess very similar a. a. sequences and perform essentially the same biological function.
