RESPIRATION is the process by which the chemical energy in the food (glucose) is converted into heat energy.
takes place in every single cell in the body.
all cells need energy.
AEROBIC RESPIRATION
- gives out 2000 kJ of energy
- with oxygen
- glucose + oxygen = energy + carbon dioxide + water
- C6H12O6 + 6O2 = energy + 6CO2 + 6H2O
ANAEROBIC RESPIRATION (in humans)
- absense of oxygen
- in low oxygen conditions, or exercise: when not enough oxygen is supplied, muscles swap to anaerobic.
- glucose = lactic acid + energy (200 kJ)
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