BIO SCI E109 Chapter Notes - Chapter 11: Myoglobin, Excess Post-Exercise Oxygen Consumption, Motor Neuron
8 Oct 2016
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11. 4 atp production in skeletal muscle: skeletal muscle fibers have three ways to produce atp. [1] from creatine phosphate: first source of atp during muscle contraction. [2] by anaerobic glycolysis: when oxygen levels are low. [3] by aerobic respiration: when sufficient oxygen is available: several factors contribute to muscle fatigue. Muscle fatigue: the inability of a muscle to maintain force of contraction after prolonged activity. Central fatigue: caused by changes in the central nervous system, before actual muscle fatigue occurs, a person may have feelings of tiredness and the desire to cease activity, this response is called central fatigue. [2] depletion of creatine phosphate (the atp levels in fatigued muscle often are not much lower than those in resting muscle) [6] failure of action potentials in the motor neuron to release enough acetylcholine: oxygen consumption increases for a while after exercise.
