Volume of alr inspires in one minute/dm
before the race
5.8
after the race
20.5
(1) Calculate the difference in the volume of air inspired in one minute by the student before
the race and after the race.
Volume=
dm
(i) State two other ways in which
the students' breathing changes from before the race to
after the race
1.
[2]
2.
(ii) Explain why an increased volume of air is needed during the race.