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.
Homeostasis. It is important that the bodyâs internal environment is controlled. For example, the amount of carbon dioxide in the bloodstream is carefully controlled. Maintaining a constant internal environment is called homeostasis. The nervous system and hormones are responsible for this. Here are some of the other internal conditions that are controlled: Blood sugar level. This is controlled to provide cells with a constant supply of energy. The blood sugar level is controlled by the release and storage of glucose, which is in turn controlled by a hormone called insulin. Body temperature. This is controlled to maintain the temperature at which enzymes work best, which is 37Â°C. 1  Body temperature is controlled by: 2  controlling blood flow to the skin. 3  sweating. 4  shivering.