Human physiology . Fio. 23.—Rabbits parotid in fresh state. (Lan^ley.) A. rest in- stub1; B, after injection ofweak doses of pilocarpine ; C, after stimulation of cerviral sympathetic; D, after moreprolonged stimulation of this nerve. the periphery or margin of the cell (Fig. 22, A). After prolongedsecretion excited by stimulation of the secretory nerves, the cellsappear much reduced from loss of the clear inucinogenoussubstance, the cytoplasm stains, the nucleus is rounded, with adistinct nucleolus which has moved to the centre of the cell(Fig. 22, B). The subject of these histological resear
Human physiology . Fio. 23.—Rabbits parotid in fresh state. (Lan^ley.) A. rest in- stub1; B, after injection ofweak doses of pilocarpine ; C, after stimulation of cerviral sympathetic; D, after moreprolonged stimulation of this nerve. the periphery or margin of the cell (Fig. 22, A). After prolongedsecretion excited by stimulation of the secretory nerves, the cellsappear much reduced from loss of the clear inucinogenoussubstance, the cytoplasm stains, the nucleus is rounded, with adistinct nucleolus which has moved to the centre of the cell(Fig. 22, B). The subject of these histological researches is (as Heidenhainpoints out) not the living cell, but its dead body, altered, moreover,by the technique of hardening and staining. Yet, since thephenomena are so constant, we may safely conclude that theliving cells also are differently constituted in the resting and inthe active state, owing to the manufacture of secretion. Eecentcomparative researches on gland cells in fragments of living glandfresh from t
Size: 1753px × 1425px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectphysiology, bookyear1
