The process in which the receptors in the skin turn the stimulation into a neural impulse is called transduction. In addition, transduction is the process by which sensory input is converted to a neural code and sent to the brain. A signal in which a hormone or neurotransmitter interrelates with a receptor on the cell surface in which this contact causes a alteration in a second messenger such calcium and will eventually a alteration is activated in the function of cell.
The thyroid is a butterfly-shaped gland that lies in front of the windpipe (trachea), just below the voice box. The parathyroid glands are four tiny glands located behind the thyroid gland. The parathyroid glands produce a substance (parathyroid hormone) that helps control the amount of calcium in the blood.
