Hormone, mineralocorticoid
A group of hormones, the most important being aldosterone, that regulates the balance of water and electrolytes (ions such as sodium and potassium) in the body. The mineralocorticoid hormones act specifically on the tubules of the kidney.
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- Hormone, parathormone
Hormone made by the parathyroid gland (behind the thyroid gland in the neck). Parathormone (pronounced para-thor-mone) is critical to calcium and phosphorus balance. Deficiency of parathormone results in abnormally low calcium in the blood (hypocalcemia). Also call parathyrin.
- Hormone, progesterone
A female hormone, progesterone is the principal progestational hormone. Progestational hormones prepare the uterus (the womb) to receive and sustain the fertilized egg.
- Hormone, secretin
Hormone made by glands in the small intestine that stimulates pancreatic secretion. The word “hormone” was coined by the English physiologists Wm. M. Bayliss and Ernest H. Starling in connection with their discovery of secretin, the first hormone, in 1902.
- Hormone, T3
Triiodothyronine, a thyroid hormone. The number 3 is usually in subscript.
- Hormone, thyroid
Chemical substance made by the thyroid gland which is located in the front of the neck. The thyroid gland uses iodine to make thyroid hormones. The two most important thyroid hormones are thyroxine (T4) and triiodothyronine (T3).