Rapid changes to skin color in many vertebrates are under the control of melanocyte-stimulating hormone.
Therefore, the correct answer is Option A.
What are melanocytes?
- A melanocyte is a mature melanin producing cell which is found especially in the skin.
- These are highly differentiated cells and are dark in color and dendrite shaped.
- Their main function is melanin formation which leads to skin pigmentation.
- Melanocyte-stimulating hormone (MSH) or melanotropin refers to a group of hormones released by the skin cells, pituitary gland, and the hypothalamus.
- They promote secretion of melanin which protects the skin from the UV rays of the sun, pigmentation and control appetite.
- These are peptide hormones which exist in 3 forms i.e. alpha, beta and gamma.
Learn more about melanocytes here:
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