Zoology - Breathing and Exchange of Gases Question with Solution | TestHub
Read the following statements about respiratory system of humans:
I. Type II alveoli help in secretion of a chemical surfactant called lecithin, which decreases the surface tension around alveoli.
II. The diffusion membrane for exchange of gases is made up of three major cellular layers.
III. Binding of oxygen with haemoglobin is primarily related to the partial pressure of O2.
IV. Every 100 ml of oxygenated blood can deliver around 5 ml CO2to the tissues under normal physiological conditions.
How many statements is/are correct from the above?
Options:
Answer:
Solution:
The diffusion membrane for exchange of gases is made up of three major layers: the thin squamous epithelium of alveoli, the endothelium of alveolar capillaries and the non-cellular basement membrane between them (so only two cellular layers).
