(a)[3]
Identify the order in which air passes through the structures during inspiration. Enter the letters from Table 4.1 in the boxes to show the correct sequence. One has already been completed for you.
(b)[4]
Inspired air and expired air do not have the same composition. Describe how the composition of inspired air differs from that of expired air.
(c(i))[1]
State the name of the gas that can be detected with limewater.
(c(ii))[2]
Using the information in Fig. 4.1, predict the change to the limewater in test-tube A and in test-tube B.
(d)[2]
Describe how vigorous exercise affects breathing.