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.
For example, blood glucose level is an internal condition regulated by the hormone insulin. When blood sugar levels are high and cannot be controlled, it can lead to diabetes and other medical conditions. Other internal conditions that require regulation for homeostasis are body temperature and water content.