Write short notes on the function of the following hormones:
(a) Parathyroid hormones (PTH)
(b) Thyroid hormones
(c) thymosin
(d) Androgens
(e) Estrogens
(f) Insulin and glucagon.
Write short notes on the function of the following hormones:
(a) Parathyroid hormones (PTH)
(b) Thyroid hormones
(c) thymosin
(d) Androgens
(e) Estrogens
(f) Insulin and glucagon.
(a) Parathyroid hormone increases the level of calcium and decreases the level of phosphate in the blood.
(b) The thyroid gland secretes three hormones: Thyroxine, triiodothyronine and calcitonin. Thyroxine and triiodothyronine control the general metabolism of the body, promote the growth of body tissues and stimulates tissue differentiation. Calcitonin regulates the concentration of calcium in the blood.
(c) Thymosin is secreted by the thymus. It accelerates cell division, stimulates the development and differentiation of T- lymphocytes and also hastens the attainment of sexual maturity.
(d) Androgens are secreted by the testis. They stimulate the development of the male reproductive system, formation of sperms, development of male accessory sex characters and also determines the male sexual behaviour and the sex urge.
(e) Estrogens are secreted by ovaries. They stimulate the female reproductive tract to grow to full size and become functional, differentiation oval and the development of accessory sex characters.
(f) Insulin is secreted by the β cells of the pancreas. It lowers blood glucose level and promotes synthesis of proteins and fats: Glucagon is secreted by the alpha- cells of the pancreas. It increases the level of glucose in the blood.
(a) Parathyroid hormone increases the level of calcium and decreases the level of phosphate in the blood.
(b) The thyroid gland secretes three hormones: Thyroxine, triiodothyronine and calcitonin. Thyroxine and triiodothyronine control the general metabolism of the body, promote the growth of body tissues and stimulates tissue differentiation. Calcitonin regulates the concentration of calcium in the blood.
(c) Thymosin is secreted by the thymus. It accelerates cell division, stimulates the development and differentiation of T- lymphocytes and also hastens the attainment of sexual maturity.
(d) Androgens are secreted by the testis. They stimulate the development of the male reproductive system, formation of sperms, development of male accessory sex characters and also determines the male sexual behaviour and the sex urge.
(e) Estrogens are secreted by ovaries. They stimulate the female reproductive tract to grow to full size and become functional, differentiation oval and the development of accessory sex characters.
(f) Insulin is secreted by the β cells of the pancreas. It lowers blood glucose level and promotes synthesis of proteins and fats: Glucagon is secreted by the alpha- cells of the pancreas. It increases the level of glucose in the blood.
