title: Enhancement of the sensitivity of Tetrahymena to a second hormonal influence by hormone pretreatment.
abstract: Diiodotyrosine and serotonin enhance the growth of Tetrahymena. A second exposure of the unicellular to these hormones accounts for a still greater increase of its growth rate, probably due to the amplification of the receptor induced by the first exposure.
mesh_terms: D000818:Animals; D004105:Diiodotyrosine / Q000008:administration & dosage / Q000494:pharmacology*; D011956:Receptors, Cell Surface / Q000378:metabolism; D012701:Serotonin / Q000008:administration & dosage / Q000494:pharmacology*; D013769:Tetrahymena pyriformis / Q000187:drug effects* / Q000254:growth & development / Q000378:metabolism
chemical_list: D011956:Receptors, Cell Surface; D012701:Serotonin; D004105:Diiodotyrosine