Question

5. Explain, as briefly as possible, how the partial pressures of both carbon dioxide and oxygen cause oxygen to move from the lungs to the cell and carbon dioxide to move from the cell to the lungs.3

4. At constant moles and pressure, calculate the effect of doubling the temperature of the gas in ⁰C on the volume. Start with 100⁰C

6. Describe how Boyle’s Law applies to what happens when you breathe?

Answer 1

Ans 5 :

There is a simple rule that gases always diffuse from higher concentration to lower concentration.

Now when we inhale in air , the partial pressure of oxygen in lungs and arterial blood increases. There is a decreased partial pressure of oxygen in the cells and tissue ( due to metabolism reactions) , so the oxygen diffuses from the arterial blood to the cells.

Now in the cells the CO2 partial pressure is more , and the blood has lower partial pressure of CO2. So CO2 diffuses from cells to the venous blood , and returns it to the lungs , from where it can be expelled out.