The Glycolytic System Flashcards
what is the type of reaction?
anaerobic
what is the fuel used?
glycogen/glucose
what is the reaction site?
sarcoplasm
what are the controlling enzymes/
GPP (glycogen and glucose), PFK (glucose to pyruvic acid), and LDH (pyruvic to lactic acid in anaerobic conditions)
what is the ATP yield?
2 ATP
what are the by-products?
lactic acid
what is the intensity of the system?
high intensity
what is the duration of the system?
10- 180 seconds
sporting examples from individual actvities
long tennis singles rally, 400m race
sporting example from a team game
a centre court player during open play
advantages of the system
- large supplies of glucose available
- anaerobic, no need to wait for O2
- allows high intensity for up to 3 mins
- resynthesis 100% more ATP than ATP-PC system
- lactic acid can be converted back to liver glycogen
disadvantages of this system
build up of lactic acid
- increases acidity, lowers pH
- inhibits enzyme action of GPP, PFK
- stimulates pain receptors
- low ATP yield compared to aerobic
- 60 minute recovery
stages within the system
1) GPP converts glycogen to glucose
2) PFK converts glucose to pyruvic acid + energy
3) LDH converts pyruvic acid to lactic acid
4) energy produced in 2 used to convert 2ADP + 2P into 2ATP
