10Muscle1_3perPage (1).pdf - Muscle Tissue M echanics P hysiology Muscle Tissue \u2022 T ypes cardiac sm ooth skeletal\u2026 \u2022 6 functions of skeletal m

10Muscle1_3perPage (1).pdf - Muscle Tissue M echanics P...

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5/21/19 1 Muscle Tissue M echanics Physiology Muscle Tissue Types: cardiac, smooth, skeletal… 6 functions of skeletal muscle – skeletal movement – maintain position/posture – support soft tissue – guard openings – help maintain body temperature – store nutrient reserve Organization of Skeletal Muscle Epimysium Perimysium Fascicle Endomysium Fiber
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5/21/19 2 Skeletal Muscle Blood supply Extensive due to high metabolism – FYI 1200 ml/min rest – FYI 4500 - 12,500 ml/min during activity Nerve supply to muscle from central nervous system mostly consciously controlled voluntary muscle Features of Skeletal muscle cells multinucleate cells cells called fibers arrangement of internal proteins results in striations Fiber details Sarcolemma… conducts signal for contraction Packed full of myofibrils T h in f ila m e n ts T h ic k f ila m e n ts Transverse (T) tubules F ille d w ith E C F c o n d u c t s ig n a l d e e p sarcoplasm g ly c o g e n s to r a g e m y o g lo b in lo w [ C a +2] m ito c h o n d r ia
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5/21/19 3 Fiber details sarcoplasmic reticulum (SR) C a +2 io n s to r a g e
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  • Mark Bolke

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