Related Experiment Videos
[Effect of izadrin, inderal and netalid on the periodic activity of the rabbit myometrium]
The contractility of an isolated rabbit uterus was studied. It was found that when used in low concentrations (1.10(-9)-1.10(-7) g/ml) isoprenaline, while stimulating the beta-adrenoreceptors of the uterus, inhibits its contractions, whereas in high concentrations (1.10(6)-1.10(-5) g/ml) it is capable of intensifying uterine contractions owing to stimulation of the uterine alpha-adrenoreceptors. Dihydroergotoxin (1.10(-6) g/ml), a blocking agent of alpha-adrenoreceptors, averts and eliminates the stimulating effect of isoprenaline on the uterus. Propranolol and netalide, blocking agents of the beta-adrenoreceptors, abolish the already developed depressing action of isoprenaline on the contractile activity of the uterus, but fail to prevent this effect with their preliminary application.
The contractility of an isolated rabbit uterus was studied. It was found that when used in low concentrations (1.10(-9)-1.10(-7) g/ml) isoprenaline, while stimulating the beta-adrenoreceptors of the uterus, inhibits its contractions, whereas in high concentrations (1.10(6)-1.10(-5) g/ml) it is capable of intensifying uterine contractions owing to stimulation of the uterine alpha-adrenoreceptors. Dihydroergotoxin (1.10(-6) g/ml), a blocking agent of alpha-adrenoreceptors, averts and eliminates the stimulating effect of isoprenaline on the uterus. Propranolol and netalide, blocking agents of the beta-adrenoreceptors, abolish the already developed depressing action of isoprenaline on the contractile activity of the uterus, but fail to prevent this effect with their preliminary application.