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.
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- 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).
- Hormone, thyroid stimulating (TSH)
A hormone produced by the pituitary gland at the base of the brain in response to signals from the hypothalamus gland in the brain. TSH promotes the growth of the thyroid gland in the neck and stimulates it to produce more thyroid hormones. When there is an excessive amount of thyroid hormones, the pituitary gland […]
- Hormone, thyrotropin
A hormone produced by the pituitary gland at the base of the brain in response to signals from the hypothalamus gland in the brain. The suffix -tropin indicates “an affinity for”. Thyrotropin has an affinity for the thyroid. Thyrotropin is known also as thyroid stimulating hormone (TSH). Thyrotropin (or, if you prefer, TSH) promotes the […]
- Hormone, thyroxine
A chemical substance made by the thyroid gland The thyroid gland uses iodine to make thyroid hormones. Thyroxine (T4), one of the most important thyroid hormones, has four iodine molecules attached to its molecular structure.