[The role of endogenous modulators of chemoreactivity in the regulation of coronary blood flow].

32 circulatory bands of coronary arteries of 5 pigs were studied. It has been revealed that the bands develop long-term tonic contraction activity in Krebs's solution (30 mM of KCl). In this case adrenalin in concentration of 10(-7) g/ml causes mild relaxation.

[Effect of the long-term exposure of the isolated myometrium from nonpregnant rats to serum from pregnant women on its contractile activity and the beta-adrenergic reactivity].

Pregnant women's blood serum (the whole as well as 50- and 100-diluted) did not alter parameters of spontaneous motility, i.e. it did not affect the uterus myocytes' spontaneous motility, whereas the whole or 50-diluted serum raised considerable the rat myometrium's beta-adrenoreaction.