a) The chemical reactions inside the cells are controlled by enzymes.
b) During aerobic respiration (respiration that uses oxygen) chemical reactions occur that: use glucose and oxygen and release energy.
c) Aerobic respiration takes place continuously in both plants and humans.
d) Most of the reactions in aerobic respiration take place inside the mitochondria.
e) Aerobic respiration is summarised by the equation:
glucose+oxygen-->carbon dioxide+water(+energy)
f) Energy that is released during respiration is used by the organism. The energy may be used: to build larger molecules from smaller ones, in animals to enable muscles to contract, in mammals and birds to maintain a steady body temperature in colder surroundings and in plants to build up sugars, nitrates and other nutrients into amino acids which are then built up into protein.
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