title: Some special respiratory effects of CO2 in pigeons.
abstract: Injections of CO2-gas have been made into an abdominal air-sac of pigeons. The resulting alterations of respiratory rate and of breathing efforts are dose-dependent and easily reproducible. The receptive zones for these effects do not seem to be located in the air-way system itself; they may be in the respiratory center. Some data provide further evidence for the assumption that the ventilation of the abdominal air-sacs is mainly one-directional, from outside to gas-exchange compartments. Panting increases the ventilation of the abdominal air-sacs.
mesh_terms: D000400:Air Sacs / Q000502:physiology; D000758:Anesthesia; D000818:Animals; D001831:Body Temperature; D002245:Carbon Dioxide / Q000494:pharmacology*; D010856:Columbidae / Q000502:physiology*; D005260:Female; D008297:Male; D012119:Respiration / Q000187:drug effects*; D013997:Time Factors
chemical_list: D002245:Carbon Dioxide