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.
Your adrenal glands are about 3 inches wide, pyramid-shaped, and sit right above your kidneys. These glands produce hormones that help us deal with stress. The center of the adrenal gland is called the medulla. It produces the hormone adrenaline which results in epinephrine and norepinephrine. The outer part of the gland, known as the cortex, makes the hormones aldosterone, DHEAs, cortisol, and trace amounts of the hormones testosterone and estrogen.