Abstract
Isolated Malpighian tubules of Papilio demodocus, the citrus swallowtail butterfly, were stimulated by biogenic amines as well as by cyclic AMP and the naturally occuring diuretic hormone. The greatest secretory response was obtained with 5-hydroxytryptamine, and smaller responses with dopamine and noradrenaline, but none of these amines could induce the maximal secretion rates obtained with cyclic AMP and diuretic hormone. Various other biogenic amines, hormones and pharmacological agents, including adrenaline, had no effect on Papilio tubules. The blocking agents cyproheptadine, phentolamine and propranolol did not alter the tubule response to biogenic amines.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
