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.
Temperature control is an example of a negative feedback homeostatic mechanism. The region of the brain called the hypothalamus monitors the human body's temperature. Variation from the normal temperature of 98.6&Acirc;&deg;F (37&Acirc;&deg;C) triggers a response from the hypothalamus.