title: Aged rats: diminished sympathetic-adrenal medullary responses to acute stress.
mesh_terms: D000375:Aging; D000818:Animals; D004597:Electroshock; D004837:Epinephrine / Q000097:blood*; D008297:Male; D009638:Norepinephrine / Q000097:blood*; D051381:Rats; D011916:Rats, Inbred F344; D013312:Stress, Physiological / Q000097:blood*
chemical_list: D009638:Norepinephrine; D004837:Epinephrine