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.
Anatomy of the adrenal glands. Adrenal glands, which are also called suprarenal glands, are small, triangular glands located on top of both kidneys. An adrenal gland is made of two parts--the outer region is called the adrenal cortex and the inner region is called the adrenal medulla. Function of the adrenal glands. Adrenal glands work interactively with the hypothalamus and pituitary gland in the brain. The hypothalamus produces corticotropin-releasing hormone (CRH) that stimulates the pituitary gland to produce adrenocorticotropin hormone (ACTH).