General physiology; an outline of the science of life . A B Fig. 178.—Amcxba. A, Normal; B, after tetanic stimulation upon a tuning fork. their pseudopodia completely and are in the stage of completecontraction, , more or less completely spherical (Fig. 178). Ifthe experiment be interrupted after a brief period of shaking,according to the time of the interruption the various stages in theformation of tetanus can be observed. The pseudopodia are then. Fig. 179 —Actinosphcerium. A, Undisturbed ; B, at the beginning of strong tetanic stimulation ;C, in complete mechanical tetanus. incompletel
General physiology; an outline of the science of life . A B Fig. 178.—Amcxba. A, Normal; B, after tetanic stimulation upon a tuning fork. their pseudopodia completely and are in the stage of completecontraction, , more or less completely spherical (Fig. 178). Ifthe experiment be interrupted after a brief period of shaking,according to the time of the interruption the various stages in theformation of tetanus can be observed. The pseudopodia are then. Fig. 179 —Actinosphcerium. A, Undisturbed ; B, at the beginning of strong tetanic stimulation ;C, in complete mechanical tetanus. incompletely retracted. The phenomena in long, thread-likepseudopodia, such as in Actinosphcerium or Orbitolites, arecharacteristic (Figs. 179 and 180). With very slight shakingthe pseudopodia remain smooth and straight, as they were when STIMULI AND THEIR ACTIONS 387 undisturbed, and their protoplasm flows slowly but constantlywithout exception in a centripetal direction. But, if the shakingbe more intense, they assume a varicose appearance, their centri-petally streaming protoplasm collecting into many small spindlesand globules, of which the smaller flow into the adjacent largerones, while the larger ones constantly approach the centralprotoplasmic body; upon long-continued action all protoplasmflows into the This curious formation of dropletsupon pseudopodia is a peculiarity of strongly and continuallystimulated protoplasm which is general
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Keywords: ., bookcentury1800, bookdecade1890, bookidgen, booksubjectphysiology
