Pulmonary hypertension is a rare lung disorder in which the arteries that carry blood from the heart to the lungs become narrowed, making it difficult for blood to flow through the vessels. As a result, the blood pressure in these arteries -- called pulmonary arteries -- rises far above normal levels.
Homeostatic Control Mechanisms Homeostatic Control Mechanisms are devices for maintaining or restoring homeostasis. They involve virtually all of the bodyâs organs and systems.
Other events or variables that are controlled by homeostatic processes include blood pressure, heart rate and blood oxygen levels, among many others. The basics of biology teach that homeostatic control systems contain three individual components that work together to control a variable within the organism. The three parts of the system are the receptor, the control center and the effector.