. The cell; outlines of general anatomy and physiology. Fig. 57.—Orbitolites. A portion of the surface with its pseudopodia: A undisturbed ; Bthe whole has been stimulated by repeated shaking. (After Verwornlll. 24, Fig. 7.) Thisis of importance to Rhizopoda in absorbing food. gradually shortens itself, a motion in which the neighbouringthreads eventually participate, the Infusorian is gradually drawninto the centre of the protoplasmic mass, where it undergoesdigestion. V. Chemical Stimuli. A living cell is able to a certainextent to adapt itself to chemical changes in its environment. Forthis
. The cell; outlines of general anatomy and physiology. Fig. 57.—Orbitolites. A portion of the surface with its pseudopodia: A undisturbed ; Bthe whole has been stimulated by repeated shaking. (After Verwornlll. 24, Fig. 7.) Thisis of importance to Rhizopoda in absorbing food. gradually shortens itself, a motion in which the neighbouringthreads eventually participate, the Infusorian is gradually drawninto the centre of the protoplasmic mass, where it undergoesdigestion. V. Chemical Stimuli. A living cell is able to a certainextent to adapt itself to chemical changes in its environment. Forthis, however, one thing is most important, namely that thechanges should be made gradually, not suddenly. JEthalium plasmodia flourish in a 2 per cent, solution of grape-sugar, if the latter is added in gradually increasing quantities tothe water (IV. 35). If they were to be transferred straight frompure water into this chemically different environment, the suddenchange would result in their death ; this would also occur if theywere to be suddenly plac
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