the general forms of the sa time curves were in keeping with the idea that plasma cholesterol is carried to the skin surface in association with the epidermal and sebaceous cells , whereby ( a ) cholesterol synthesized de novo is mixed with derived from plasma and ( b ) appearances of plasma cholesterol on the skin surface is delayed by a time factor that corresponds to the movement of epidermal and sebaceous cells from the basal layer to the skin surface .
C0014520
epidermal
C0221925
cells