Beta-2 adrenergic receptors are the only subgroup of beta-adrenergic receptors expressed in the membrane of large cells, including skin keratinocytes, fibroblasts, and melanocytes. Alterations in the function or concentration of β2 adrenoreceptors related to keratinocytes are associated with some skin conditions. Some findings suggest the role of β2 adrenoreceptors in maintaining the function and integrity of the epidermis.