Final answer:
The medulla oblongata largely controls eupnea through the respiratory centers and receives inputs from sensory receptors and higher brain centers.
Step-by-step explanation:
The control of eupnea, or normal breathing, is largely controlled by the medulla oblongata in the brainstem. This region contains the respiratory centers (RCs) which process the input from sensory receptors, such as the carotid bodies and aortic bodies, and send signals to the respiratory muscles, primarily the diaphragm, to regulate breathing rate and volume. The medulla also receives descending inputs from higher brain centers, such as the hypothalamus, which can modulate breathing in response to various stimuli.