American journal of physiology . Figure 6. Figure Figure 8. Under the influence of physostigmine (Fig. 8), atropine, or sul-phate of strychnia, the aboral pole usually breaks down first, other-wise the visible results are thesame. Jennings ^ has observed that Paramoecia are not appreciablyharmed by placing them in dis-tilled water. This rather surprisingfact must depend upon their offer-ing a great resistance to the entrance of water. The absorption ofwater, which forms such an important feature in the effects of lackof oxygen, and of poisoning, shows a reduction of this resistance, butpro
American journal of physiology . Figure 6. Figure Figure 8. Under the influence of physostigmine (Fig. 8), atropine, or sul-phate of strychnia, the aboral pole usually breaks down first, other-wise the visible results are thesame. Jennings ^ has observed that Paramoecia are not appreciablyharmed by placing them in dis-tilled water. This rather surprisingfact must depend upon their offer-ing a great resistance to the entrance of water. The absorption ofwater, which forms such an important feature in the effects of lackof oxygen, and of poisoning, shows a reduction of this resistance, butprobably depends also upon an-other factor, as is indicated by thefollowing observation (Fig. 9). Figure 9 represents the changesshown by a sympathetic nerve cellfrom the Frog, when exposed to afive per cent solution of potassiumcyanide. The drawings are froma series of twelve, which were madewith a camera lucida in rapid succession. The osmotic pressure ofthe potassium cyanide solution being above that of the cell, water1 Jennings : Journal of physiol
Size: 2232px × 1120px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookautho, bookcentury1800, bookdecade1890, booksubjectphysiology
