| sex reversal, gonadal | Change from one sex to another with regard to gonadal development; may be induced or occurs naturally in some invertebrates. (12 Dec 1998) |
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| sterilisation reversal | A surgical procedure used to undo a previous sterilisation operation and restore fertility. (09 Oct 1997) |
| sterilization reversal | Reversal of sexual sterilization. (12 Dec 1998) |
| Ornish reversal diet | A diet designed by Dean Ornish, who has evidence that it will reverse coronary artery disease. It consists of 10% of calories from fat (mostly polyunsaturated or monounsaturated, with 5 mg cholesterol per day), 70 to 75% from carbohydrate, and 15 to 20% from protein. (05 Mar 2000) |
| epinephrine reversal | The fall in blood pressure produced by epinephrine when given following blockage of alpha-adrenergic receptors by an appropriate drug such as phenoxybenzamine; the vasodilation reflects the ability of epinephrine to activate beta-adrenergic receptors which, in vascular smooth muscle, are inhibitory; in the absence of alpha-receptor blockade, the beta-receptor activation by epinephrine is masked by its predominant action on vascular alpha-receptors, which causes vasoconstriction. Synonym: adrenaline reversal. (05 Mar 2000) |