Question

MSH produced by the pars intermedia of pituitary causes in .......... lower vertebrates.

• A. Darkening of skin
• B. Light colouration of skin
• C. Both A and B
• D. None of the above

Answer 1

The correct option is A Darkening of skin

MSH, melanocyte stimulating hormone, is secreted by the anterior pituitary and stimulates melanocytes to produce melanin in lower vertebrates. Depending on the amount of melanin and carotene, colour of skin is determined from pale yellow to dark. Thus, option A is correct. Options B and C are incorrect as the amount of carotene determines the colouration of the skin

So, the correct answer is 'Darkening of skin'