What makes the structure of Haemoglobin good for the transport of oxygen to tissues? (3 marks)
Haemoglobin (Hb) is comprised of 4 polypeptide chains (2 alpha, 2 beta). Each polypeptide chain has a prosthetic group capable of picking up oxygen, therefore one Hb molecule can transport 4 oxygen molecules. Oxygen binds the Hb reversibly so that it may be released at the level of the respiring tissue where the partial pressure of oxygen is lower (moves down the concentration gradient).
NL
Related Human Biology A Level answers
All answers ▸‘Smokers suffer from more lower respiratory tract infections.’ Justify this statement in light of respiratory tract protection mechanisms.
What is the difference between skeletal, cardiac and smooth muscle?
Explain the function of the human heart
Explain the Cardiac Cycle