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.
What do the adrenal glands do? The medulla is located in the center of the gland and makes adrenalineAdrenaline - the hormone that helps control the fight or flight response and puts the body on high alert (also known as epinephrine) and noradrenaline. These hormones are also known as epinephrine and norepinephrine.