. The endocrine organs; an introduction to the study of internal secretion . hnic produces a doublerise of blood-pressure; he ascribes the first to direct stimulation of thevasomotors, the second to the outpouring of adrenalin into the latter phase fails to appear if the suprarenals are extirpated (figs. 43,44). In the cat Cannon found that the dilatation of the pupils and up-standing of the fur which accompany sudden alarm or excitement areassociated with an increased outpouring of adrenalin into the suprarenalveins, and he has drawn attention to the fact that many of the phenomena
. The endocrine organs; an introduction to the study of internal secretion . hnic produces a doublerise of blood-pressure; he ascribes the first to direct stimulation of thevasomotors, the second to the outpouring of adrenalin into the latter phase fails to appear if the suprarenals are extirpated (figs. 43,44). In the cat Cannon found that the dilatation of the pupils and up-standing of the fur which accompany sudden alarm or excitement areassociated with an increased outpouring of adrenalin into the suprarenalveins, and he has drawn attention to the fact that many of the phenomena 70 The Endocrine Organs which characterise violent emotional states (both in animals and man) aresimilar to those which are produced by excess of the suprarenal autacoidin the blood. It is conjectured that the hyperglycsemia and glycosuria which resultfrom Bernards sugar puncture are accompanied by and probably largely dueto stimulation of the suprarenals through the splanchnics causing the passageof an excess of adrenalin into the blood, which in turn produces increased. Fio. 43.—Effect on blood-pressure of stimulating the splanchnic nerves. The first rise in blood-pressure is caused by constriction of the vessels of the splanchnic area, the second by out-pouring of adrenalin into the blood. The numbers above the abscissa denote the numberof pulse beats in ten seconds, (v. Anrep.)
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