to determine if alpha 1-or alpha 2-adrenergic receptors mediate the inhibition of acth stimulation of growth hormone secretion , decrease in blood pressure and inhibition of renin secretion produced by release of catecholamines in the brain , drugs with varying amounts of alpha 1- and alpha 2-adrenergic activity were injected directly into the third ventricle in pentobarbital anesthetized dogs .
C0006104
brain
C0149555
third ventricle