A COMPARATIVE STUDY OF THE OXYGEN CONSUMPTION OF THE VERTEBRATE RETINA, WITH ESPECIAL REFERENCE TO THE NUCLEO-PROTOPLASMIC RATIO

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Abstract
Cytological measurements and O2 consumption detns. were made upon the following vertebrate retinae: sucker, chub, shiner, frog, Necturus, toad, snake, tortoise, and alligator. The cell population of different retinae was found to range from 72,900/mg. in the Necturus, to 925,000/mg in shiner. The ratio of volumes of nucleus to cytoplasm was approx. 1:10 in all except Necturus, alligator and tortoise, which had ratios of 1:3.3, 1:5.6, 1:14.3, respectively. No apparent correlation seemed to exist between the nucleo-cytoplasmic ratios and the mean rate of O2 consumption of the various retinae. This was interpreted to indicate that the whole protoplasmic mass contributed equally to the total metabolism of the cells. The O2 consumption per nerve cell was computed in relation to its nuclear and cellular volumes.

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