Question

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Increase in the area of lungs causes a decrease in ______(i)______ making the air to move in. This change is caused by the ____(ii)_____ movement of diaphragm.

• A. (i) Volume, (ii) Downward
• B. (i) Pressure, (ii) Upward
• C. (i) Pressure, (i) Downward
• D. (i) Volume, (ii) Upward

Answer 1

The correct option is C (i) Pressure, (i) Downward

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> During inhalation, the diaphragm moves downward causing a decrease in pressure. This pressure difference brings air into the lungs, and during exhalation, the diaphragm moves upward. This causes an increase in pressure. This increase in pressure pushes the air out.