Which of the following brain structures is responsible for regulating breathing when a person requires oxygen?

A) The cerebellum
B) The hypothalamus
C) The thalamus
D) The medulla

Medulla

The innermost part of an organ or structure, especially the central part of the brainstem, responsible for regulating vital body functions such as breathing and heart rate.

Regulating Breathing

The process by which the body controls the rate and depth of respirations, primarily through the respiratory center in the brainstem.