Addison's disease

Addison's disease causes a lack of adrenocortical secretion, and results in extreme weakness, weight loss, low blood pressure, gastrointestinal disturbances, and brownish pigmentation of both the skin and the mucous membranes.

See also

• Endocrine system
• Adrenal glands
• Cortisol

membrane The word "membrane" can have different meanings in different fields of biology. In cell biology, a membrane is a layer of molecules that surround its contents. Examples of cell-biology membranes include the "cell membrane" that surrounds a cell, the "mitochondrial membranes" that form the outer layers of mitochondria, and the "viral envelope" that surrounds enveloped viruses. In anatomy or tissue biology, a membrane is a barrier formed by a layer of cells. Examples of anatomical membranes include the pleural membranes that surrounds the lungs, the pericardium which surrounds the heart, and some of the layers within the blood-brain barrier.