. General physiology; an outline of the science of life. 564 GENERAL PHYSIOLOGY With their decomposition the surface-tension would increase, and the stimulated protoplasm would necessarily flow back centripetally, so that the pseudopodia would be retracted—a phenomenon that is called out in a very characteristic manner by all sorts of stimuli. Thus the phase of contraction would be mechanically explained. After their return to the central cell-body the biogen-molecules would have an opportunity to regenerate themselves with the aid of substances produced by the protoplasm and the nucleus, whic
. General physiology; an outline of the science of life. 564 GENERAL PHYSIOLOGY With their decomposition the surface-tension would increase, and the stimulated protoplasm would necessarily flow back centripetally, so that the pseudopodia would be retracted—a phenomenon that is called out in a very characteristic manner by all sorts of stimuli. Thus the phase of contraction would be mechanically explained. After their return to the central cell-body the biogen-molecules would have an opportunity to regenerate themselves with the aid of substances produced by the protoplasm and the nucleus, which are absolutely necessary to the intact life of the cell; then after the introduction of oxygen they would begin their course anew. In accordance with this idea, all the special phenomena exhibited by amoeboid protoplasmic masses in their movement may be understood. The necrobiotic phenomena of naked protoplasmic masses especially, which can be followed very beautifully in amputated, non-nucleated, hyaline pseudopodia of Dijlugia. 0. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Verworn, Max, 1863-1921; Lee, Frederic S. (Frederic Schiller), 1859-1939. London, Macmillan and co. , limited; New York, The Macmillan company
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