6.1 Respiration and Energy
Define respiration
 Respiration is a series of chemical reactions that occur
to break down chemical energy such as glucose, fat
and proteins.
 Respiration is occurring all the time in all cells – this is
why all cells need a blood supply so they can get
oxygen.
Define aerobic respiration
 Aerobic respiration occurs in the mitochondria of
cells. It requires oxygen and produces a lot more
energy for the cell than anaerobic respiration.
State the word equation for
aerobic respiration
glucose + oxygen → carbon dioxide + water + energy
State the word equation for
aerobic respiration using symbols
C6H12O6 + 6O2 → 6CO2 + 6H2O + energy
State the uses of energy in the
body of humans
 muscle contraction
 cell division
 absorption of nutrients
 impulses along verves
 protein synthesis (making enzymes, hormones and
antibodies)
 making new cell organelles
 maintaining body temperature