The partial pressures (in mm Hg) of oxygen (O2) and carbon dioxide (CO2) at alveoli (the site of diffusion) are :
1. pO2 = 95 and pCO2 = 40
2. pO2 = 159 and pCO2 = 0.3
3. pO2 = 104 and pCO2 = 40
4. pO2 = 40 and pCO2 = 45
Match the following columns and select the correct option:
Column I | Column II | ||
(a) | Pneumotaxic Centre | (i) | Alveoli |
(b) | O2 Dissociation curve | (ii) | Pons region of the brain |
(c) | Carbonic Anhydrase | (iii) | Haemoglobin |
(d) | Primary site of exchange of gases | (iv) | R.B.C. |
Options: | (a) | (b) | (c) | (d) |
1. | (i) | (iii) | (ii) | (iv) |
2. | (ii) | (iii) | (iv) | (i) |
3. | (iii) | (ii) | (iv) | (i) |
4. | (iv) | (i) | (iii) | (ii) |