Muscle Cell Anatomy and Physiology
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| ______ fibers use aerobic pathways and have a ____ fatigue resistance. They are _____ because of their high ____ content. They need many _____ to produce ___ and many _____ for an adequate blood supply | Slow oxidative, high, dark red, myoglobin, mitochondria, ATP, capillaries//used for endurance, marathon, postural
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| _______ fibers on the other end of the spectrum. They're ______ bc they have ____ myoglobin content. Have few mitochondria as they rely upon _____ to produce ___ from the high amt. of ____ they store. Contract fast bc of their fast _____ but ____ fast too | fast glycolytic, pale/white, low, glycolysis, ATP, glycogen, ATPase, fatigue//// short term, rapid intense, fastest contraction velocity
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| _____ have a bit of both worlds. They produce their ATP mostly ____ & thus are ___ to ___ bc of the fairly high ____ content. They have many ____ to burn fuel, but they can also use ____ pathways to break down some of their ____ stores to produce ATP | fast oxidative, aerobically, red, pink, myoglobin, mitochondria, anaerobic, glycogen
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| Muscle Organization from Large to Small | Muscles that contains fasicles. Fasicles contain fibers/cells, which contain many myofibrils
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| Muscle Sheaths | -Epimysium covers muscle
-Perimysium covers fasicles
-Sarcolemma covers muscle fiber (cell)
-Endomysium is connective tissue around sarcolemma covered muscle fibers
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