| 释义 |
dromotropic, a.|drɒməˈtrɒpɪk|
[f. Gr. δρόµος running + τροπικός (see tropic a. 4).]
†a. Bot. (See quot. 1890.) Obs.
b. Physiol. [a. F. dromotrope (T. W. Engelmann 1901, in Arch. Néerland. des Sci. exactes et nat. 2nd Ser. VI. 690).] Affecting the conduction of nervous impulses through muscles of the heart. So droˈmotropism (rare).
1890C. Macmillan in Amer. Naturalist XXIV. 367 It is proposed to term the motion of twining plants—so far as that motion is the result of the specific irritability—dromotropism, and we can then speak of such twining shoots as dromotropic. 1902Encycl. Brit. XXXI. 733/2 The centrifugal cardiac nerves influence the frequency, the force of contraction, and the conductivity of the excitatory wave (chrono-, ino-, and dromo-tropism of Engelmann). 1906J. R. Murlin tr. Tigerstedt's Textbk. Human Physiol. vi. 189 Engelmann describes these effects of vagus excitation as..negatively dromotropic (diminishing the conductivity). 1942Index-Catal. Libr. Surg. Gen. 4th Ser. VII. 347/2 (heading) Heart nerves... Dromotropic action. 1968Davson & Eggleton Princ. Human Physiol. (ed. 14) vii. 169 The vagi may diminish the conduction of the excitatory process from atria to ventricles and to all parts of the ventricles (dromotropic effect). |