Respuesta :
High resistance to muscle fatigue, more reliant on oxidative metabolism and large Triglyceride stores are type i muscle fibers. Low Mitochondrial density, large glycogen stores and more reliant on glycolytic metabolism are type ii muscle fibers.
Myofibrils are the building blocks of muscle fibres. The basic functional, contractile units of the muscle fibre required for muscular contraction are found in the myofibrils, which are made of actin and myosin filaments known as myofilaments and repeated in units known as sarcomeres. The oxidation of lipids and carbohydrates provides the majority of the energy for muscles, although anaerobic chemical processes are also utilized, especially by quick twitch fibers.
Adenosine triphosphate (ATP) molecules are created as a result of these chemical processes and are utilised to drive the motion of the myosin heads. Multiple fascicles are bundles of muscular fibres found inside skeletal muscles.
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