[KNPE 125] - Final Exam Guide - Everything you need to know! (92 pages long)

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3 types of muscle: skeletal (voluntary, striated, smooth (involuntary, non-striated, cardiac (involuntary, striated) Connective tissue: epimysium (surrounds entire muscle, perimysium (divides muscle into sections called fascicles, endomysium (surrounds individual muscle fibres, tendon (attaches muscle to bone) Crossbridges: when myosin head binds to the actin active site a crossbridge is formed = contraction occurs, myosin undergoes a power stroke by pulling on actin and shortening the sarcomere. Length-tension relationship force of a muscle contraction reflects number of active cross- bridges. Fiber diameter larger fibers = greater forces, max. force linked to amount of muscle. Excitation-contraction coupling events that link an action potential to muscle contraction, controls how muscle contractions are turned on/off, involves release of calcium via the triad: t- Tubules (ap > muscle), sarcoplasmic reticulum (stores, releases, uptakes calcium), feet (include the dihydropyridine receptor which is voltage sensitive located in the membrane of t-tubule,

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