The oxidative process occuring within living cells by which the chemical energy of organic molecules is released in a series of metabolic steps involving the consumption of oxygen and the liberation of carbon dioxide and water.
Thic can occur aerobically or anaerobically - with or without oxygen.
What is ATP?
Name: Adenosine Tri-Phophate
Chemical Formula: C10H16N5O13P3
Job: It releases energy when broken down into ADP.
Aerobic Respiration VS Anaerobic Respiration
C6H12O6 + O2 ----> CO2 + H2O + ATP
C6H12O6 -----> Lactic Acid + ATP
Differences between aerobic and anaerobic
Substrate: Glucose and Oxygen
Products: Carbon dioxide and water
ATP Quantity: 38
Products: Lactic acid
ATP Quantity: 2
Muscles in Action
Normal Activity - During normal activity the muscles will respire aerobically
Increased physical activity - As the muscles are unable to be supplied with enough oxygen they must respire anaerobically which causes an increase in lactic acid.
Carbon dioxide is a waste product and concentrations in muscles increase causing the pH to become more acidic.
ATP credit - Oxygen Debt
Lactic acid is transported to the liver so that it can be converted into a compund used to produce ATP.
You can continue to breathe heavily after exercise as the additional oxygen is needed to oxidise the lactic acid formed.
ATP was on credit and the oxygen is needed to pay back the debt.