Electrophysiology of newt skin: responses to salt-depletion, aldosterone, arginine vasotocin and epinephrine.
1. Newts (Taricha granulosa), salt-depleted by 3 weeks' immersion in distilled water, showed significantly higher in vitro integumental short-circuit current (SCC) than control newts immersed in dilute saline. 2. Isolated, in vitro preparations of newt skin responded to aldosterone (10(-6) M), arginine vasotocin (10(-9)-10(-8) M), and epinephrine (10(-7)-10(-5) M) by increasing SCC. 3. The hormonal response of the skin of this salamandrid urodele, as judged from in vitro (Ussing chamber) measurements, is similar to that seen in classical anuran ("frog skin") preparations.
Brown
S C
SC
Department of Biological Sciences, State University of New York, Albany 12222.
Savage
L M
LM
Brown
P S
PS
D000450:Aldosterone / Q000502:physiology; D000818:Animals; D004594:Electrophysiology; D004837:Epinephrine / Q000502:physiology; D006400:Hematocrit; D066298:In Vitro Techniques; D009994:Osmolar Concentration; D012455:Salamandridae / Q000502:physiology*; D012879:Skin Physiological Phenomena; D012965:Sodium Chloride / Q000172:deficiency; D014668:Vasotocin / Q000502:physiology
D012965:Sodium Chloride; D000450:Aldosterone; D014668:Vasotocin; D004837:Epinephrine