title: Mechanisms of CO2 challenges.
mesh_terms: D000280:Administration, Inhalation; D001007:Anxiety / Q000175:diagnosis / Q000503:physiopathology; D001794:Blood Pressure / Q000187:drug effects; D002245:Carbon Dioxide / Q000097:blood / Q000378:metabolism; D005239:Fear / Q000502:physiology; D006801:Humans; D006854:Hydrocortisone / Q000097:blood; D008125:Locus Coeruleus / Q000378:metabolism*; D009638:Norepinephrine / Q000378:metabolism; D016584:Panic Disorder / Q000175:diagnosis / Q000378:metabolism / Q000503:physiopathology
chemical_list: D002245:Carbon Dioxide; D006854:Hydrocortisone; D009638:Norepinephrine