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Secretory responses of plasma insulin, glucagon, cortisol and glucose to heat exposure in calves.

1986; Japanese Society of Veterinary Science; Volume: 48; Issue: 6 Linguagem: Inglês

10.1292/jvms1939.48.1287

1881-1442

Hideyuki Takahashi, Hideo Murata, Hideto Matsumoto,

Effects of Environmental Stressors on Livestock

Secretory responses of plasma insulin, glucagon, cortical and glucose to heat exposure (33°C, 60% RH) were investigated using Holstein calves. Plasma gluagon concentration had a significant increase, but plasma insulin, cortisol and glucose had significant decreases within 24 h following heat exposure. Concerning subsequent responses to heat exposure, plasma glucagon level maintained increased concentrations for 8 days of heat exposure. Plasma insulin level increased on and after day 4 of heat exposure. However, plasma cortisol and glucose levels maintained declined levels throughout the heat days.