Cellular respiration is an exothermic reaction which transfers energy from glucose and is continuously occurring in living cells
Cellular respiration
Breaking apart glucose molecules to release the energy that's trapped inside
How organisms use their energy
Building up larger molecules from smaller ones (e.g. combining amino acids to form proteins)
Muscular contraction for movement
Maintaining body temperature
Energy is needed for loads of reactions in our cells, most of which are catalyzed by enzymes
Metabolism
All the chemical processes that occur within a living organism in order to maintain life
Aerobic respiration
More common type, takes place whenever there's enough oxygen, most efficient way to transfer energy from glucose, takes place continuously in both plants and animals, occurs within mitochondria
Aerobic respiration
Glucose + Oxygen → Carbon dioxide + Water
The equation for aerobic respiration is the opposite of the equation for photosynthesis
Anaerobic respiration
Respiration without oxygen, used when there is not enough oxygen to keep up with the demands of aerobic respiration, results in incomplete breakdown of glucose and lactic acid buildup
Anaerobic respiration
Glucose → Lactic acid
Anaerobic respiration in plants and yeast
Glucose is converted to ethanol and carbon dioxide instead of lactic acid, used in industry to make bread, beer and wine
Fermentation is the process of anaerobic respiration in yeast
