MSH is secreted by the
Correct answer: B. Middle lobe of pituitary
- A. Anterior lobe of the pituitary
- B. Middle lobe of pituitary
- C. Posterior lobe of the pituitary
- D. Endostyle
Explanation
Option B is correct.The middle lobe of the pituitary secretes a hormone named melanocyte-stimulating hormone. It stimulates the synthesis of the black pigment melanin in the skin, and also causes dispersal of melanin granules in the pigment cells, thereby darkening the colour in certain animals (fish, amphibians). In man, it has no such role. The anterior lobe of the pituitary secretes FSH, LH, TSH, ACTH, and STH. The posterior lobe of the pituitary secretes oxytocin and vasopressin.
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Chemical coordination uses hormones released by endocrine glands and carried in blood to specific target cells. Coverage includes the pituitary, thyroid, pancreas, adrenal glands, ovaries and testes, feedback control, and the contrast between slower, longer-lasting hormonal responses and rapid nervous coordination.
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