uv; Previtamin; active; liver; 27; Calcitriol
7-dehydrocholesterol, when exposed to __ light in the skin, turns into the cis D3 called ___________ D3. This then turns into the trans D3 which is the _______ form. This is sent to the ______ for storage. It can then be hydroxylated on the 25th carbon by CYP__A1 on its way to the kidney.
In the kidney, we have the source of the sensing of this hormone. The kidney also monitors Ca and phosphate levels, and kidney can convert the 25-cholecalciferol to the active 1,25-dihydroxycholecalciferol (called _________). This will then be transported to the blood to different tissues.