title: Foot-shock induced stress increases beta-endorphin levels in blood but not brain.
mesh_terms: D000324:Adrenocorticotropic Hormone / Q000097:blood; D000818:Animals; D001921:Brain / Q000378:metabolism*; D004597:Electroshock; D004723:Endorphins / Q000097:blood / Q000378:metabolism*; D007031:Hypothalamus / Q000378:metabolism; D008297:Male; D010902:Pituitary Gland / Q000378:metabolism; D051381:Rats; D013312:Stress, Physiological / Q000378:metabolism*
chemical_list: D004723:Endorphins; D000324:Adrenocorticotropic Hormone