RT Book, Section A1 Rice, Robert H. A1 Mauro, Theodora M. A2 Klaassen, Curtis D. A2 Watkins, John B. SR Print(0) ID 6484631 T1 Chapter 19. Toxic Responses of the Skin T2 Casarett & Doull's Essentials of Toxicology, 2e YR 2010 FD 2010 PB The McGraw-Hill Companies PP New York, NY SN 978-0-07-162240-0 LK accesspharmacy.mhmedical.com/content.aspx?aid=6484631 RD 2023/11/30 AB The skin participates directly in thermal, electrolyte, hormonal, metabolic, and immune regulation.Percutaneous absorption depends on the xenobiotic's hydrophobicity, which affects its ability to partition into epidermal lipid, and rate of diffusion through this barrier.The cells of the epidermis and pilosebaceous units express biotransformation enzymes.Irritant dermatitis is a nonimmune-related response caused by the direct action of an agent on the skin.Allergic contact dermatitis represents a delayed (type IV) hypersensitivity reaction, whereby minute quantities of material elicit overt reactions.