Melanin concentration and vitamin d production

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1.Compare a positive feedback loop and negative feedback loop for homeostasis. Body temperature is an example of a negative feedback loop. Imagine that body temperature was regulated as a positive feedback loop and explain what would happen.

2.In many species, not just humans, melanin concentration is highest at the equator, and is reduced in the population as one moves further away in latitude. What is the relationship between melanin concentration and vitamin D production? What mechanisms explain the loss of melanin as one moves closer to the poles?

Reference no: EM132934727

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