Question

According to Boyle's law, the product of pressure and volume is a constant. Considering this, which of the following would be true?

• A. If the volume of lungs is increased, the intra-pulmonary pressure increases proportionately.
• B. If the volume of lungs is increased, the intra-pulmonary pressure decreases proportionately.
• C. If the volume of lungs is increased, the intra-pulmonary pressure increases disproportionately.
• D. If the volume of lungs is increased, the intra-pulmonary pressure remains the same.

Answer 1

The correct option is B If the volume of lungs is increased, the intra-pulmonary pressure decreases proportionately.

According to Boyle's law, the product of pressure and volume is a constant, indicating that they are inversely proportional to each other. Thus, as the volume of the lung increases, the intra-pulmonary pressure decreases. This causes atmospheric air to enter the lungs, to bring about a balance.