Last Modified: 2011-07-01
-string of globular (G) actin subunits
-each has active site that can bind to head of myosin molecule
-transfers forces of muscle contraction to connective tissue
-genetic defects in dystrophin produce disabling disease muscular dystrophy
-marrow spaces lined with endosteum
no longer produces blood
-replace oxygen reserves
-replenish the phosphagen system
-oxidize lactic acid (produced by muscles and enter into bloodstream)
-serve the elevated metabolic rate
-red (hemoglobin - lots)
-abundance in mitochondria
-adapted for aerobic respiration and fatigue resistance
-"white" or low in blood/hemoglobin/capillaries
-low mitochondria, myoglobin
-rich in enzymes of phosphagen and anaerobic metabolism components
-adapted for immediate/fast/strenous work
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