Abstract
Secretory responses of insulin, glucagon and cortisol were investigated in Holstein calves moderately exposed to cold (2°C). Plasma insulin, glucagon and cortisol showed a prompt increase at 30 min of cold exposure. With regard to delayed responses, plasma cortisol presented a gradual rise with a maximum level at 4 days of cold exposure. Plasma insulin and glucagon also kept high levels for 8 days in the cold environment.
