125
Brazilian Journal Medicalinand Biological Research (1997) 30: 125-131 Temperature andofhypoxia frogs ISSN 0100-879X
Cardiovascular, respiratory and metabolic responses to temperature and hypoxia of the winter frog Rana catesbeiana P.L. Rocha and L.G.S. Branco
Departamento de Fisiologia, Faculdade de Odontologia de Ribeirão Preto, Universidade de São Paulo, 14040-904 Ribeirão Preto, SP, Brasil
Abstract Correspondence L.G.S. Branco Departamento de Fisiologia Faculdade de Odontologia de Ribeirão Preto Universidade de São Paulo 14040-904 Ribeirão Preto, SP Brasil Fax: 55 (16) 633-0999 E-mail:
[email protected] Research supported by FAPESP (No. 96/0711-7) and CNPq. P.L. Rocha was the recipient of a CAPES fellowship.
Received February 6, 1996 Accepted November 11, 1996
The objective of the present study was to determine the effects of hypoxia and temperature on the cardiovascular and respiratory systems and plasma glucose levels of the winter bullfrog Rana catesbeiana. Body temperature was maintained at 10, 15, 25 and 35oC for measurements of breathing frequency, heart rate, arterial blood pressure, metabolic rate, plasma glucose levels, blood gases and acid-base status. Reducing body temperature from 35 to 10oC decreased (P
