1. 1. Testosterone is able to inhibit the development of tolerance in the smooth muscle of the rat vas deferens. 2. 2. Cycloheximide and actinomycin D also inhibit the tolerance to morphine and ethanol in smooth muscle of rat vas deferens. 3. 3. The toxic effect of cycloheximide and actinomycin D do not play roles in the inhibition of tolerance. 4. 4. The physiological responses of vas deferens to norepinephrine are not altered by cycloheximide and actinomycin D.
ASJC Scopus subject areas