7.Phosphocreatine

CATEGORY:

•Energy Pathways

DEFINITION:

•Molecule that serves as a rapidly mobilised reserve of high-energy phosphates in skeletal muscle and brain...not an energy source itself

FUNCTION:

•Anaerobically donates a phosphate group to ADP (produced from spent ATP) to re-form ATP during the first 2 to 7 seconds following intense muscular or neuronal effort

•Excess ATP can be used during a period of low effort to convert creatine to phosphocreatine

•Primary ingredient in ATP-PC Cycle

•Stores replenished during Aerobic activity and Homeostasis

ACTION:

•Phosphocreatine is synthesized in the liver and transported to the muscle cells, via the bloodstream, for storage

•Manufactured in the liver, pancreas, and kidneys

FACTS:

•Also known as Creatine Phosphate

•Constructed of carbon, hydrogen, nitrogen, oxygen, and phosphorus

•Formed naturally within the body, with over 95% of the compound stored within the muscle cells...approx120g

•Rate at which Phosphocreatine is utilised depends on intensity of muscle contraction

MANIPULATION:

•Liver produces phosphocreatine from amino acids....body also receives dietary creatine through meat

•ATP-PC Cycle replenished after 2mins rest

DIETING:

•Formed from parts of three amino acids: arginine (Arg), glycine (Gly), and methionine (Met)

RELATED TO:

•ATP

•Aminos

NOTES: