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The Clinical Measurement Ontology (CMO), Measurement Methods Ontology (MMO), and Experimental Condition Ontology (XCO) are currently being developed at the Rat Genome Database. For more information about these vocabularies please see Shimoyama et al. Three ontologies to define phenotype measurement data. Front Genet. 2012;3:87. Epub 2012 May 28 or contact us (

Term:methacholine response/sensitivity measurement
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Accession:CMO:0000738 term browser browse the term
Definition:Measurement of an organism's, organ's, tissue's or cell's capacity to respond, such as by a change in activity, state or condition, to methacholine, a quaternary ammonium ion in which the nitrogen is substituted with three methyl groups and a 2-acetoxypropyl group and which acts as a parasympathomimetic bronchoconstrictor.
Synonyms:xref: CHEBI:6804

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  clinical measurement 2369
    chemical response/sensitivity measurement 0
      methacholine response/sensitivity measurement 0
        dose of methacholine at which pulmonary conductance is half its pretreatment value 0
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