(a)[3]
State the names for tissues A, B and D.
(b)[3]
Describe the function of the glands labelled C in Fig. 1.1 in helping to keep the gas exchange system healthy.
(c)
Hyperventilation happens when someone breathes too rapidly or too deeply. Its effects are: a fall in the partial pressure of carbon dioxide in alveolar air; a rise in the pH of the blood. Fig. 1.3 shows how the oxygen dissociation curve changes as a result of hyperventilation.
(c(i))[1]
State the percentage saturation of haemoglobin at a $p\text{O}_2$ of $4.0\,\text{kPa}$ for pH $= 7.7$ and for pH $= 7.4$.
(c(ii))[2]
Use the information in Fig. 1.3 to state and explain how hyperventilation affects the supply of oxygen to the respiring tissues.