. The endocrine organs; an introduction to the study of internal secretion . intestine insteadof uterus, and (5) the same, using strips of artery cut transversely. The effect of suprarenal extract upon the heart and vessels is not theonly action upon plain muscle, although it is the most obvious. Other-involuntary muscular tissue supplied by sympathetic fibres is also may be in the direction of increased contraction (sphincters of pylorusand of ileocsecal valve, spleen, vagina, uterus,1 vas deferens, retractor penis), 1 Cushny finds that the uterus of a pregnant cat is contracted
. The endocrine organs; an introduction to the study of internal secretion . intestine insteadof uterus, and (5) the same, using strips of artery cut transversely. The effect of suprarenal extract upon the heart and vessels is not theonly action upon plain muscle, although it is the most obvious. Other-involuntary muscular tissue supplied by sympathetic fibres is also may be in the direction of increased contraction (sphincters of pylorusand of ileocsecal valve, spleen, vagina, uterus,1 vas deferens, retractor penis), 1 Cushny finds that the uterus of a pregnant cat is contracted by adrenalin, whilst thenon-pregnant uterus is usually inhibited. In the rat inhibition is the usual effect (fig. 39),but in the rabbit (fig. 40) and most animals contraction is produced. Effects of Intravenous Injection of Suprarenal Extracts 63 or of inhibition (intestine (fig. 41), stomach, oesophagus, gall-bladder, urinarybladder). Certain of the plain muscles of the orbit and globe of the eyeare excited when suprarenal extract is injected intravenously, so that the. FIG. 40.—Effect of solution of adrenalin on cornu uteri of rabbit, the contraction of which is>*• . ^increased. I am indebted to Dr M. Itagaki for the tracings shown in figs. 39 and 40.
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