Insect Salivary Glands: Stimulation of Fluid Secretion by 5-Hydroxytryptamine and Adenosine-3′,5′-monophosphate

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Abstract
Low concentrations (10 -9 M ) of 5-hydroxytryptamine increase the rate of fluid secretion by isolated salivary glands of adult Calliphora . 5-Hydroxytryptamine is present in Calliphora brain. Adenosine-3′,5′-monophosphate (cyclic AMP) also stimulates fluid secretion and may be involved in the mode of action of 5-hydroxytryptamine.