NEET 2012 Biology question

What is correct to say about the hormone action in humans ?

(1)FSH stimulates the secretion of estrogen and progesterone
(2)Glucagon is secreted by -cells of Islets of Langerhans and stimulates glycogenolysis
(3)Secretion of thymosins is stimulated with aging
(4)In females, FSH first binds with specific receptors on ovarian cell membraneCorrect

Answer: (4)

Solution

FSH is a peptide (water-soluble) hormone, so it cannot cross the plasma membrane; it first binds to specific receptors on the cell membrane of its target ovarian (granulosa) cells and acts through second messengers. Hence (4) is correct. (1) is wrong because FSH stimulates the growth of follicles and the secretion of

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Question ID VK-091214