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15 Cards in this Set
- Front
- Back
glycolysis
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bd of carbs to resynth ATP
|
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pyruvate |
end result of glycolysis |
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2 possible directions for pyruvate: |
2 shuttled into mitochondria- kreb cycle, ATP rate slower, longer duration(if low intensity) *depends on energy demands |
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muscle acidosis |
-direct effect on muscle excite contract-coupling |
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factors that effect lactate accumulation:
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2 MF type 3 duration 4 initial glycogen levels |
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blood lactate concentration
|
lactate production and clearance |
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cori cycle
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lactate transported in blood to liver and converted to glucose |
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glycolysis to kreb cycle
|
-acetyl-CoA enters kreb for ATP resyth. |
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Allosteric (othersite) regulation |
* "endpoint" |
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allosteric inhibition
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occurs when end product binds to regulatory enzyme -decreases turnover rate and product function |
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allosteric activation
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binds with enzyme - increases its turnover * "activator" |
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lactate threshold |
blood lactate begins an abrupt increase above baseline concentration |
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onset of blood lactate accumulation |
2nd increase in rate of lactate accumulation - occurs with higher intensity of exercise |
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Oxidative system
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"aerobic" system
-prim source of ATP @rest, low intensity |
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oxidative ATP production
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-70% fats, 30% carbs - protein only during long term starvation, long bouts of exercise (>90 min) - as intensity increases, there is shift from fats>>carbs |