Question

Oxygen combines with haemoglobin in the blood to form_______

Answer 1

Haemoglobin is a protein that is made up of four haem groups, which contain iron ions. These iron ions (Fe2+) associated with haemoglobin molecules chemically react with oxygen to form oxyhaemoglobin. Each molecule of haemoglobin can hold four oxygen molecules.

Answer 2

Answer:

• Once oxygen has entered the blood from the lungs, it is taken up by haemoglobin (Hb) in the red blood cells. These iron ions (Fe2+) associated with haemoglobin molecules chemically react with oxygen to form oxyhaemoglobin. Each molecule of haemoglobin can hold four oxygen molecules.