The ATP – PC system - Creatine Phosphate System 2. Anaerobic Respiration 3. Aerobic Respiration
Explain how the creatine phosphate system works
ATP breaks down to ADP + Pi to release energy. - The ADP + Pi must be reformed to ATP for continued muscle function. - PC provides the energy for the free Pi to be re-attached to the ADP molecule to form ATP. - PC stored in the muscles breaks down anaerobically (without O2) to form Phosphate and creatine. This releases energy for the resynthesis of ATP. - It takes 2 PC molecules to resynthesise 1 ATP molecule (one PC = 0.7 ATP). - The Creatine Phosphate System lasts about 10 seconds
Who would use CrP stores?
What is anaerobic respiration?
During anaerobic activity, your muscles are not supplied with enough oxygen. Glucose + Oxygen = Lactic Acid + Energy
When would anaerobic respiration be employed? And how sustainable is it?
short bursts of intense exercise; only for short time as no oxygen.. Problem is the build up of lactic acid
What is the oxygen debt?
After Anaerobic exercise, lactic acid will have built up. Muscles need Oxygen to get rid of the lactic acid. This extra Oxygen is called the OXYGEN DEBT. It is paid off by gulping air in to the lungs.Oxygen debt = Amount of oxygen needed to get body back to resting rate.