A resting muscle has a lower respiration rate than an active muscle. The graph displays dissociation curves for haemoglobin at carbon dioxide concentrations that occur in muscle and in an active muscle. P and Q are at the partial pressures of oxygen found in the lungs. R and S are at the partial pressures of oxygen found in either a resting muscle or an active muscle. Which statements are correct?
- A1 and 2
- B3 and 4
- C1 only
- D5