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Energy & Oxygen for Muscle Contraction

Energy & Oxygen for Muscle Contraction. Where is energy needed. Energy is needed in three(3) places At the cross-bridges for movement Sliding Filament Mechanism At the cross-bridge & Actin binding site To break connection At the Sarcoplasmic Reticulum To pump Ca+ back into the S.R.

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Energy & Oxygen for Muscle Contraction

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  1. Energy & Oxygen for Muscle Contraction

  2. Where is energy needed • Energy is needed in three(3) places • At the cross-bridges for movement • Sliding Filament Mechanism • At the cross-bridge & Actin binding site • To break connection • At the Sarcoplasmic Reticulum • To pump Ca+ back into the S.R.

  3. Energy Sources for Muscle Contraction • ATP • Best source of energy • Only last about 3-5 seconds on the body and is used even faster. • Creatine Phosphate • 4 6 times more abundant in the body than ATP. • Is broken down to make ATP. • Can provide enough energy to sustain muscle contraction for about 15 seconds.

  4. Energy Sources for Muscle Contraction Cont… • Glycogen • Stored form of Glucose (sugar) • Is broken down to make ATP. • Can provide enough energy to sustain muscle contraction for several mins. • Fat • The body will turn to fat as a source of energy for muscle contraction when the contraction is for a prolonged strenuous activity and when the other sources of energy have been used up.

  5. Oxygen Supply • Oxygen is required for cells to make ATP. • Cellular Respiration: process that makes ATP. • Fermentation: process that makes ATP without oxygen. • Oxygen Debt: If the cells doesn’t have enough oxygen carry out respiration it shifts to fermentation. • Lactic Acid is a by-product of fermentation and can build up in the cell, it also requires oxygen to be broken down. • Heavy Breathing, Muscle Cramps, Muscle Spasms • Muscle Fatigue: The inability for a muscle to contract in a normal manner.

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