“At times of low volume cardiac output, cardiopulmonary volu…

“At times of low volume cardiac output, cardiopulmonary volume receptors detect low volumes and relay information to the hypothalamus in the brain. In response, the hypothalamus increases the production of the steroid hormone vasopressin. Vasopressin causes the body to retain water, increasing salt concentration in the bloodstream, thereby increasing blood pressure and cardiac output.” What is the control center in this homeostasis example?