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Question

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

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

The correct option is A Darkening of skin
MSH stimulates secretion of melanin from pigment cells in the skin and thereby causes skin darkening as required for camouflage in some lower vertebrates. Depending on the amount of melanin and carotene, the colour of skin is determined from pale yellow to dark. Thus, the correct answer is option A.

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