title: Neurohemal organ extracts effect the ventilation oscillator in crustaceans.
abstract: Extracts of the pericardial organs of crabs injected into intact animals cause an increase in the frequency of scaphognathite beating. The active factor is not dopamine of 5-hydroxytryptamine, which are present in pericardial organs; it is probably a peptide. The factor may represent a hormonal mechanism of coordinating heart rate and ventilation.
mesh_terms: D000818:Animals; D003400:Astacoidea / Q000187:drug effects; D003386:Brachyura / Q000187:drug effects; D003445:Crustacea / Q000187:drug effects / Q000502:physiology*; D006339:Heart Rate / Q000187:drug effects; D009490:Neurosecretory Systems; D012119:Respiration / Q000187:drug effects; D014020:Tissue Extracts / Q000494:pharmacology*
chemical_list: D014020:Tissue Extracts