Question

The hormone which darkens the skin of frog is

• A. Insulin
• B. Oestrogen
• C. Melanocyte stimulating hormone
• D. None of the above
  

Answer 1

The correct option is C Melanocyte stimulating hormone

A. Insulin is secreted from the ββ-cells of islet of Langerhans and regulates blood glucose levels.

B. Oestrogen is the female sex hormone secreted from ovarian follicles and stimulate the development of female secondary sex organs.

C. Melanocyte stimulating hormone is secreted from the intermediate lobe of pituitary gland. It maintains the skin pigmentation in vertebrates.

Hence, in frog, the hormone which darkens the skin of frog is melanocyte stimulating hormone.

So, the correct answer is 'Melanocyte stimulating hormone'.