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 located just on top of the kidneys. The adrenals are an integral part of the endocrine system. The medulla, which is the inner part, pours out epinephrine (adrenaline) and norepinephrine. These hormones speed up the body's metabolism in order to help us to cope with stress.