TY - CHAP M1 - Book, Section TI - Chapter 93. Thermoregulation A1 - Kellogg, Dean L. A2 - Goldsmith, Lowell A. A2 - Katz, Stephen I. A2 - Gilchrest, Barbara A. A2 - Paller, Amy S. A2 - Leffell, David J. A2 - Wolff, Klaus PY - 2012 T2 - Fitzpatrick's Dermatology in General Medicine, 8e AB - |PrintHuman Thermoregulation at a GlanceThermoregulatory reflexes involve changes in skin blood flow and sweating that act to preserve thermal balance with an internal temperature of approximately 37°C (98.6°F).Thermal balance is determined by metabolic heat production; evaporative heat loss; heat gain or loss through radiant, convective, and conductive mechanisms; and useful mechanical work done.Dermal papillary loops, arteriovenous anastomoses, and sweat glands are the major skin effectors of thermoregulation.Heat stress evokes large increases in skin blood flow and sweating through cholinergic cotransmitter and nitric oxide-dependent mechanisms to facilitate heat dissipation.Local skin heating causes a local vasodilation through antidromic neurotransmitter release from afferent skin nerves and increased nitric oxide generation.Cold stress evokes reduced skin blood flow through noradrenergic cotransmitter mechanisms to facilitate heat conservation.Local skin cooling causes a local vasoconstriction through noradrenergic and afferent neural mechanisms as well as nonneural mechanisms. SN - PB - The McGraw-Hill Companies CY - New York, NY Y2 - 2024/04/19 UR - accessmedicine.mhmedical.com/content.aspx?aid=56052148 ER -