What is accurate about the transport of carbon dioxide by blood? 1. The enzyme carbonic anhydrase speeds up the production of carbonic acid in red blood cells. 2. Carbon dioxide moves by diffusion from respiring cells to red blood cells and combines with water. 3. Carbonic acid dissociates to produce hydrogen ions, which join with haemoglobin to make carbaminohaemoglobin.
- A1, 2 and 3
- B1 and 2 only
- C2 and 3 only
- D3 only