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need to know both a and b A. describe the various energy sources for muscle contraction...

need to know both a and b

A. describe the various energy sources for muscle contraction and how they function.

B. discuss what is meant by "motor unit" and how this relates to muscle contraction, fatigue and strength
Science   Anatomy-And-Physiology   
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Answer #1

A. ANSWER: Various sources of energy for the muscle for its contraction are Creatinine phosphate, glycolysis and areo ic cellular respiration. Creatinine phosphate can typically be the source of energy for muscle contraction for upto 15 seconds. Glucose in the muscle undergo glycolysis to produce ATP as the energy source for contraction.

B. ANSWER: Motor unit is made up of motor neuron and the skeletal muscle fibres innervated by it. When a motor unit is activated the whole muscle fibre contracts. The force of muscle contraction is controlled ny the number of activated motor units. Centrally,musclefatigue is a manifest of impairment of motor neuron supplied by it.

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