to determine whether increases in the cytosolic free ca2+ concentration ( [ ca2+ ] i ) accompany agonist-stimulated surfactant secretion by cultured alveolar type ii cells , we measured the [ ca2+ ] i of quin2-loaded cells isolated from adult rats before and after cells were stimulated with ionomycin , terbutaline or tetradecanoylphorbol acetate ( tpa ) .
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secretion by
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