(a)[2]
List two characteristics of human gas exchange surfaces.
(b(i))[2]
Describe a chemical test that would show that the gas excreted through the lungs is carbon dioxide. Include both the test used and the positive result.
(b(ii))[2]
Use the figures from the list to fill in the table. Each figure may be used once, more than once or not at all.
(b(iii))[1]
State the name of gas Z in Table 5.1.
(c(i))[3]
Describe the changes in breathing rate shown in Fig. 5.1 while the athlete was exercising.
(c(ii))[2]
Calculate the percentage change in breathing rate between 0 and 10 minutes. Give your answer to the nearest whole number. Show your working.
(c(iii))[2]
Heart activity can also be used to monitor the effects of physical activity. State two methods that can be used to monitor heart activity.