Human skin color is determined by the interaction of melanin, carotene and hemoglobin. Storage of water, fat, glucose and vitamin D is also a function of the integumentary system, according to the AAD.
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Report Abuse. I would guess your first check should start in Jan or possibly Feb. It takes at least 30 days until you get into the system. If you added your son as a dependent,you will receive and check for him each month and also back pay for him. He will receive it until he is 18,or the month of his HS graduation if he turns 18 and is still in HS. Back pay takes awhile.