GCSE Biology-Respiration

Respiration and exercise

Respiration is an example of an exothermic reaction. It releases energy from glucose molecules for use by the body.Organisms need this energy for:

-Chemical reactions to build larger molecules

-For movement

-To keep warm

Respiration in cells can be aerobic (with oxygen) or anaerobic (without oxygen).

Aerobic respiration

The equation for aerobic respiration is the same in all organisms: glucose+oxygen----->carbon dioxide +water

Anaerobic respiration

Glucose is not completely broken down, meaning it transfers less energy than aerboic respiration. In animals, lactic acid is produced but in plants and yeast ethanol and…