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12 Cards in this Set
- Front
- Back
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3 main Energy pathways
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1)High energy phosphate-(anaerobic a lactic)
2)Aerobic breakdown CHO and Fat 3)Anaerobic breakdown-lactic producing) DIFFER= Yield of ATP,speed of ATP production |
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High energy phosphate
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Phosphocreatine+ADP=Creatine+ATP
-2 secs of energy,no 02,a lactic Fast breakdown=Myokinase reaction ADP+ADP=ATP+AMP -stimulated by myokinase enzyme,accelerationfast twitch fibres,muscle becomes slow if too much AMP |
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Aerobic breakdown:Glycolysis
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CHO breakdown
-Glycolysis=Phosphorolation turns glucose into pyruvate GLUCOSE IN BLOOD+2ATP -phosphorylation-> 6 C hexose phosphate -6 C hexose phosphate splits forming 2 pyruvic acid *In cytoplasm,small amount of ATP,3 ATP |
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Aerobic breakdown:Link Reaction
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-Pyruvate moves into mitochodrial matrix
-Converted into 2 C acetate and joins with CoenzymeA = AcetylcoenzymeA |
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Aerobic breakdown:Krebs Cycle
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-CoA enters Krebs cycle,becomes citric acid (citrate)
-Citrate undergoes reaction=CO2+H removed (by NADH+FADH2) -succinyl CoA+oxloacetate are other acids involved *cyclic=continuous,reduce C bonds to =ATP,2 ATP formed +2 H+ ions |
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Aerobic breakdown: Electron transport system
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-Hydrogen spilts into electrons + protons
-Electrons pass along carriers and pumps on inner membrane (electron transport chain) -protons rejoin electrons=H+ and join with oxygn to form water *34 ATP,too much H+=soreness |
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How many ATP are formed?
How many less ATP does glucose yield compared with glycogen? |
-39 ATP
-One less |
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Aerobic breakdown: Fat
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*Acetyl CoA made by Beta Oxidation*
Exactly the same,more ATP =129,requires more 02 so slower |
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Anaerobic breakdown
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*Only glycolysis
Lactate dehydrogenase convert pyruvate to lactate= lactate+H+ +NAD -2 ATP glucose/3 ATP glycgen Cori Cycle=lactate taken to liver turned back to pyruvate -2 lactate--> 2 pyruvate+6 ATP (GLUCONEOGENISIS) = glucose *insufficient,uses lots of glycogen,fast |
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Lag time
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*time between start of exercise and energy pathways kick in
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Energy stores
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Fat=95% adipose
5%muscles Glycogen=95%muscle 5%liver |
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Respiratory Exchange Ratio
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RER=VCO2
VO2 less than 1=aerobic more than 1=anaerobic LOWER rer = GREATER O2 uptake |
