Which of the following are functions of the skin? check all that apply. absorption of oils or lipid-soluble chemical or drugs, such as estrogen or nicotine, through transdermal patchesexcretion of sebum that lubricates the skin surface and hairsecretion of the waste product, urea, during sweatingsecretion of water and salt during sweating which plays a role in electrolyte homeostasisapocrine sweat glands secrete sweat by having the apical portion of epithelial cells pinch off. a. trueb. false