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.
The DSPT is divided into two equal segments of 35 hours each to be completed in successive years for a total of 70 hours. DSPs who are mandated to meet the training requirement, may opt to meet it by passing the Challenge Test for each 35-hour training program.