Abstract
Summary
Norepinephrine (N), epinephrine (E), and isoproterenol (I) increased plasma glucose in fed, newborn, and 7-day-old swine when administered by the intraperitoneal route. Liver glycogen phosphorylase was activated by the three catecholamines in newborn and 7-day-old animals. The three catecholamines did not increase plasma NEFA levels in newborn swine, although E and I induced significant lipolysis in 7-day-old animals. Norepinephrine did not induce statistically significant increases in plasma NEFA levels of the older piglets, although there was a trend toward enhanced lipolysis in this group.
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