Biology · May / June 2016 · Paper 22 · Question 5

Table 5.1 shows a number of processes that occur in the lungs and thorax (chest cavity). Table 5.1 process involved ✓ diffusion into red blood cells diffusion into the alveoli the diaphragm contracts the diaphragm relaxes the external intercostal muscles contract the internal intercostal muscles relax the ribs rise the ribs fall pressure in the thorax increases pressure in the thorax decreases

Read automatically from the paper; the printed page above is exact.