(a)[1]
Name the form of respiration that occurs when oxygen is present.
(b)[4]
A person is taking part in a race. Outline the advantages to the person of the type of respiration in (a) compared with the type of respiration that occurs when oxygen is unavailable.
(c)[5]
Describe the events that must occur in a person’s body so that a muscle cell can receive molecules of oxygen from the air.