REFLEX LIBERATION OF CIRCULATING SYMPATHIN

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Abstract
Stimulation of an afferent nerve in adrenalectomized cats under urethane anesthesia may lead to a delayed contraction of the denervated nictitating membrane. The response is dependent on how many sympathetic nerves are intact in the animal and available for reflex activation. The agent responsible for the contractions is apparently sympathin liberated reflexly into the blood: hence sympathin may play a role as a hormone in certain physiological conditions.

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