lactate anaerobic system Flashcards
what is the trigger for this system
there are no PC stores left anf so ATP must be resynthesized
where is glycogen stored
in the liver
what does lactic acid inhibit
further breakdown of glycogen as it denatures the enzymes
example of sport for this system
400m
this system is used between
10 seconds and 3 minutes
the peak usage is up to
45 seconds
what is the enzyme that breaks down glycogen into glucose
glycogen phosphorylase
what is the enzyme that breaks down glucose into pyruvic acid
phophofructokinase
what is the enzyme that breaks down pyruvic acid into lactic acid
lactate dehydrogenase
where does this process occur
in the sarcoplasm
when glucose is broken down into pyruvic acid what is released
energy
what does the energy released in the break down of glucose do
it resynthesizes 3(ADP+P) to make ATP
it produced 3 molecules of ATP but one is used up in the reaction so there is a net gain of 2 ATP, this is used for muscle contraction
when there is insufficient oxygen what happens to pyruvic acid
it is broken down into lactic acid, catalysed by lactate dehydrogenase
disadvantage: LA
lactic acid is produced as a biproduct, is accumulates and denatures enzymes reducing the rate of chemical reactions
disadvantage: production of energy
only a small amount of energy is released from glucose under anaerobic conditions, 5% compared to 95% with aerobic
how many molecules of atp are released in this system
2
advantage: time
ATP ca be resynthesizes quickly due to very few chemical reactions and it lasts longer than the ATP-PC system
advantage: eg
can be used for a sprint finish/extra burst of energy
advantage: when theres o2
in the presence of oxygen lactic acid is converted back to liver glycogen used as fuel through the oxidation into CO2 AND H2O
what is the name of the enzymes collectively
glycolytic enzymes
what is the sarcoplasm
the cytoplasm of a muscle cell
glycolytic enzymes work on the glucose molecule in…..
12 reactions in the cytoplasm of the cell
