... blockades were induced with phentolamine and propranolol respectively. Beta activity was consistently demonstrated in progesterone treated animals. Estrus animals demonstrated variable beta activity. These results suggest that progesterone pretreatment enhances beta receptor activity in the rabbit oviduct...

... labilization of target-specific lyso-somes, as well as certain additional estrogenic functions. DOC and the Α-adrenergic blocking agent, phentolamine, are inert under the same conditions. Thus, it is demonstrated that the counterpoised influence which estrogens and certain membrane-stabilizing agents...