Question 1
Paper 2Easy2 marksA student uses a spirometer to measure the volume of air exhaled during three normal breaths.
| Breath | Volume of air exhaled / dm³ |
|---|---|
| 1 | 0.46 |
| 2 | 0.50 |
| 3 | 0.54 |
(a)[1]
Determine the mean tidal volume.
(b)[1]
State one change in the diaphragm during inspiration.