The Normal Rate and Depth of Breathing is Established by the ________

Question

The normal rate and depth of breathing is established by the ________ center(s).
A) apneustic
B) pneumotaxic
C) DRG and VRG
D) expiratory
E) ventral respiratory

Accepted Answer

The normal rate and depth of breathing is established by the DRG (dorsal respiratory group) and VRG (ventral respiratory group)  centers in the medulla oblongata of the brain stem. Choice A and B, apneustic and pneumotaxic centers, respectively, are less well understood and are thought to modulate rather than establish the breathing rate and depth. Choice D and E, expiratory and ventral respiratory centers, respectively, are not directly involved in establishing the normal rate and depth of breathing.