Energy Systems Flashcards
Length of time ATP will last before depletion
3 seconds
Time at which ATP-PC threshold is reached
10 seconds
Coupled reaction
the product of one reaction used in another
exothermic
reactions produce energy
endothermic
reactions require energy
ATPase
enzyme catalysing breakdown in ATP
creatine kinase
enzyme catalysing breakdown in PC
Duration of lactic acid system
1-3 minutes
GPP, LDH, PFK
enzymes of the lactic acid system controlling breakdown of glycogen to pyruvate and then to lactate
energy yield of lactic acid system
2 ATP per molecule of glucose
energy yield of ATP-PC system
1 ATP per moecule of PC
sarcoplasm
site of reactions for ATP-PC and lactic acid systems
Kreb’s Cycle
set of reactions where oxaloacetic acid combines with Acetyl co-A to produce citric acid before being broken back down to oxaloacetic acid.
energy yield of aerobic glycolysis
38 ATP
mitochondrial cristae
site of electron transport chain
mitochondrial matrix
site of krebs cycle
end product or aerobic glycolysis
energy, co2 and h2o
energy continuum
relative contribution of energy system determined by intensity and duration of activity
OBLA
accumulation of blood lactate at or above 4mmol/l of blood
EPOC
excess post exercise energy consumption used to restore body to pre-exercise levels
alactacid debt
2/3 mins, 50% recovery in 30 seconds, restore myoglobin levels, requires 3-4 l of o2
lactacid debt
lactate converted to glucose, protein or co2, h2o and energy. 5-8 l of o2 and takes 1-24 hours
glycogen replenishment
most within 10-12 hours but could take upto 24 hours. high carb diet within 2 hours of completion can speed recovery
active recovery
light exercise will speed removal of lactate
