An index for quantitative measurement of vasoconstriction in histologic sections of blood vessels.
D000818:Animals; D001001:Anura; D001808:Blood Vessels / Q000166:cytology* / Q000187:drug effects / Q000502:physiology; D002462:Cell Membrane; D004285:Dogs; D008854:Microscopy, Electron; D009638:Norepinephrine / Q000494:pharmacology
D009638:Norepinephrine