Contribution of cellular and extracellular Ca2+ during 5-hydroxytryptamine-induced contractions of rabbit ear artery.


The ability of 5-hydroxytryptamine (5-HT) as compared to norepinephrine (NE) to mobilize different Ca2+ pools was investigated in rabbit ear artery (REA). 5-HT appears to both mobilize intracellular Ca2+ and trigger transmembrane Ca2+ influx in this preparation. Although stimulation of alpha-adrenoceptors by 5-HT appears to be involved, the duration of 5-HT… (More)


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