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.
1 ExcelTest HSPT Courses offer an intensive program with 12 classes of 3 hours each over 4 - 5 weeks. 2  ExcelTest Courses offer unique and extremely effective strategies not taught anywhere else, by highly experienced, dynamic instructors.
Both the HSPT and the ISEE are nationally administered standardized tests that help private schools evaluate candidates. Each correct answer is worth one point; the raw score is converted to a score on a scale of 200-800 (like on the SAT).