01320naa a2200193 a 450000100080000000500110000800800410001910000170006024500810007726000090015852007900016765000310095765000150098865000150100365000120101865000120103065300120104277300720105417909822017-03-31       1976    bl ---       0--  u    #d1 aSMITH, E. N.  aCutaneous heat flow during heating and cooling in Alligator mississipiensis.  c1976  aDirect in vivo measurement of heat flow across the skin of the American alligator (Alligator mississippiensis) showed increased heat flow during warming. Mean values at 25C during warming (15-35C) in air (airspeed 300 cm/s) were 17.9 +- 1.2 SE cal/cm2 per h (mean alligator wt 3.27 kg). Cooling heat flow at the same temperature was 13.6 +- 0.57 cal/cm2 per h. Subdermal heat flow was reduced during warming and was not significantly different from cutaneous heat flow during cooling. This indicated that the alligator was able to control its rate of heat exchange with the enviroenment by altering cutaneous perfusion. Atropine, phenoxybenzamine, nitroglycerin, and Xylocaine did not affect cutaneous heat flow or heating and cooling rates. Atropine bloked bradycardia during cooling.  aAlligator mississippiensis  aphysiology  aFisiologia  aJacaré  aRéptil  aReptile  tAmerican Journal of Physiologygv.230, n.5, p.1205-1210, May, 1976.