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What is correct to say about the hormone action in humans?
A
FSH stimulates the secretion of estrogen and progesterone
B
Glucagon is secreted by β-cells of Islets of Langerhans and stimulates glycogenolysis
C
Secretion of thymosins is stimulated with aging
D
In females, FSH first binds with specific receptors on ovarian cell membrane
Detailed Solution
FSH is a protein hormone; it cannot enter the cell, so it first binds to specific membrane-bound receptors on the ovarian cell membrane and acts through a second messenger.
FSH stimulates follicular growth and estrogen secretion, not progesterone. Glucagon is secreted by α-cells. Thymosin secretion decreases with ageing as the thymus degenerates.
FSH stimulates follicular growth and estrogen secretion, not progesterone. Glucagon is secreted by α-cells. Thymosin secretion decreases with ageing as the thymus degenerates.