Question 2

A researcher investigated the change in gas volume in three closed experimental chambers containing animal lung tissue preparations over a 3-hour period.

The results were recorded as follows:

Chamber P (fresh lung tissue): 1 hour (-0.8 cm³), 2 hours (-1.6 cm³), 3 hours (-2.4 cm³)
Chamber Q (inhibitor-treated lung tissue): 1 hour (-0.15 cm³), 2 hours (-0.15 cm³), 3 hours (-0.15 cm³)
Chamber R (inert plastic beads): No change at any of the times

Complete the table below to present these results.

Chamber	Change in gas volume after 1 hour ( $cm3\text{cm}^3$ )	Change in gas volume after 2 hours ( $cm3\text{cm}^3$ )	Change in gas volume after 3 hours ( $cm3\text{cm}^3$ )
P
Q
R