Final answer:
Addison's disease is a disorder characterized by the hyposecretion of cortisol. It has various causes and symptoms, and is treated with hormone replacement therapy.
Step-by-step explanation:
Addison's disease is a disorder characterized by the hyposecretion (insufficient production) of the adrenal cortex hormone cortisol. It can be caused by autoimmune disorders, infections, or pituitary gland issues. Symptoms of Addison's disease include low blood pressure, fatigue, weakness, and salt cravings. It is typically diagnosed through blood tests and imaging tests, and treatment involves hormone replacement therapy.