Langerhans' cells. melanocytes. All of these questions fall into the recall category. The correct answer is b, fibroblasts. Fibroblasts are dermal cells and are not found in the epidermis. The correct answer is a, collagen.
Collagen accounts for more than half of the protein content of tissue.
Elastin is a less abundant protein of the dermis. Keratin is found in the epidermis, albumin in the bloodstream, and myelin around nerve cells. The correct answer is e, histamine. Histamine is made predominantly by the mast cell. All of the other components are made by fibroblasts.