Abstract
Summary
Epinephrine and norepinephrine were determined by spectrophotofluorometry on plasma of ducks, pigeons, turkeys, and chickens, and on certain tissues. The concentration of E was considerably higher than N in the plasma of all species except the duck where the N/E ratio was 2.60. Ducks and pigeons have higher levels of N than E in heart tissue (atria) and chickens have less N. Anesthesia or lack of excitement decreased significantly the plasma and atrial levels of N and E in chicken and the results suggest that the variation in release and synthesis of N and E from neuronal and adrenal sites probably accounts for much of the variation observed in blood and tissue levels of catecholamines.
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