Gas Exchange Quiz (1) Biology AS & A Level

Which reactions take place in a capillary in the lungs?
1- Carbonic acid is formed from carbon dioxide and water.
2- Carbaminohaemoglobin is formed from carbon dioxide and haemoglobin.
3- Haemoglobinic acid is formed from haemoglobin and hydrogen ions.
4- Carbon dioxide and water are formed from hydrogencarbonate ions and hydrogen ions.