Increased Activity in the Neurons in the Dorsal Respiratory Group

Question

Increased activity in the neurons in the dorsal respiratory group is associated with:
A)High lung volume.
B)High levels of CO2in the blood.
C)High levels of O2in the blood.
D)Breath holding.

Accepted Answer

The dorsal respiratory group (DRG) in the medulla oblongata is primarily responsible for controlling the basic rhythm of breathing. Increased activity in the DRG is typically a response to high levels of CO₂ in the blood, which stimulates the DRG to increase the rate and depth of breathing to expel more CO₂.