A student wrote the following summary about the coordination of the body's response to maintain homeostasis during exercise:

"During intense exercise, the increased rate of cellular respiration produces higher levels of carbon dioxide in the blood. This carbon dioxide reacts with water to form citric acid, which lowers the pH of the blood. Central chemoreceptors in the cerebellum detect this change and send nerve impulses to the cardiovascular center in the medulla oblongata. The medulla then sends action potentials via the vagus nerve to the smooth muscles of the diaphragm and external intercostal muscles to increase the rate and depth of breathing."