Physiology and biochemistry in modern medicine . *«6^.ww««•W7%wr;A*»**TO*t,,**;>^ * LfgUCexsx&J. 04JH**m$0 /-/oooo. Fig. 191.—Tracing showing the effect of epinephrine on the intestinal contractions and on thearterial blood pressure. (The preliminary addition of barium to the nutritive fluid may be disre-garded.) (From Jackson.) small hook and above to a light muscle lever, by which the contractionof the muscle fibers can be observed. Epinephrine causes the muscle tocontract, but the test is not so sensitive as the foregoing, especially inthe presence of blood serum, because the pressor sub
Physiology and biochemistry in modern medicine . *«6^.ww««•W7%wr;A*»**TO*t,,**;>^ * LfgUCexsx&J. 04JH**m$0 /-/oooo. Fig. 191.—Tracing showing the effect of epinephrine on the intestinal contractions and on thearterial blood pressure. (The preliminary addition of barium to the nutritive fluid may be disre-garded.) (From Jackson.) small hook and above to a light muscle lever, by which the contractionof the muscle fibers can be observed. Epinephrine causes the muscle tocontract, but the test is not so sensitive as the foregoing, especially inthe presence of blood serum, because the pressor substances therein con-tained also cause contraction. Blood plasma does not contain the pres-sor substances, so that oxalated plasma should be used in place of serum 742 THE ENDOCRINE ORGANS, OR DUCTLESS GLANDS in applying the test. To increase the sensitiveness of the muscle, theartery ring should be slightly stretched by loading the The blood vessels of a fro</. This method depends on the same prin-
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