In this case, the damper is normally opened by the force of the spring but can be closed by the force of the motor. Removal of electrical power re-opens the damper. This style of damper is advantageous because it is fail safe; if the control to the damper fails, the damper opens and allows air to flow.
The adrenal glands, located on the top of each kidney, are responsible for releasing different hormones. Adrenal gland disorders occur when the adrenal glands produce too much or too little of these hormones.
The adrenal glands are two small structures that sit on top of the kidneys, deep in the back, behind the abdominal cavity and well beneath the back muscles.he adrenal glands are divided into an outside layer called the cortex and an inner layer called the medulla. Cells in the adrenal cortex make steroid hormones derived from cholesterol, including glucocorticoids (cortisol), mineralocorticoids (aldosterone) and androgrens. The medulla makes catecholamines (adrenaline).