What does the pneumotaxic center do?

• A. Stimulates inspiration
• B. Regulates respiratory rate through inhibition
• C. Causes coughing
• D. Triggers the sneeze reflex

Answer: (B)

The pneumotaxic center is located in the pons of the brainstem and plays a crucial role in the regulation of breathing patterns. Its primary function is to help modulate the rhythm of respiration by inhibiting inspiration. This inhibition is essential for controlling the duration of inhalation, effectively allowing for a balanced respiratory rate. By limiting how long the inspiratory neurons are active, the pneumotaxic center prevents overly prolonged inhalation, which would disrupt the normal cycle of breathing.

In this way, the pneumotaxic center ensures that breaths are taken at an appropriate rate and depth, coordinating with other centers in the brain that govern the various aspects of respiratory control. This modulation is particularly valuable during conditions that require rapid changes in breathing, such as exercise or stress. Thus, its regulatory role in breathing through inhibition is essential for maintaining homeostasis in the respiratory system.