White fibers rapid, brief contraction fast to fatigue produce about 10x force of Type 1 Anaerobic metabolism fewer capillaries & mitochondria ATP generated by glycolysis lactic acid buildup ~ĩ Type 2a Fibers Fast fatigue-resistant fibers Fast-twitch glycolitic fibers (putih) Fast-twitch oxidative fibers (merah) Slow twitch oxidative fibers (merah) Setiap orang punya 3 tipe otot, tapi berbeda pada komposisi dominan (Jauhari Johan vs John Murray/ Ben Johnson)ħ Type 1 Fibers Slow fibers Aerobic metabolismĭark red slow, sustained contraction slow to fatigue Aerobic metabolism many capillaries & mitochondria oxygen required for ATP synthesis myoglobin gives dark red appearance ~Ĩ Type 2b Fibers Fast fatigable fibers Anaerobic metabolism distal, bersifat mobilĦ TIPE OTOT SKELETAL Berdasarkan kecepatan kontraksi dan daya tahan terhadap fatigue.
proksimal, bersifat stasioner Insersio : perlekatan pada bag.
Melekat ke tulang melalui tendo Origo : perlekatan pada bag. Striate muscle Force for limb movements flexion - closes joint extension - opens joint Contract or relax ~Ĥ OTOT SKELETAL 40% BB tubuh Fungsi : mengatur posisi dan gerak rangka 2 TIPE OTOT Otot Skeletal (lurik/striata) Otot Jantung (lurik/striata)
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