Question

Which of the following is not possible when the pneumotaxic centre is sending a strong signal?

• A. Increase in rate of breathing
• B. Complete filling of lungs
• C. Decreased duration of inspiration
• D. Decreased duration of expiration

Answer 1

The correct option is B

Complete filling of lungs

The pneumotaxic centre is present in the pons and controls the switch point of inspiration. When sending a weak signal, inspiration lasts for 5 seconds, causing complete filling of the lungs. When sending a strong signal, the rate of breathing increases, i.e., the duration of inspiration and expiration decreases and complete filling of lungs is not possible.