ABSTRACT
Evidence is presented demonstrating that although a short burst of oxygen uptake follows transfer of Rana pipiens embryos from a nitrogen to an oxygen atmosphere, a similar burst follows transfer from air to oxygen. Since the material being oxidized exists in the reduced state in gastrulae raised in air, it cannot constitute a major source of anaerobic oxidations in gastrulae. Data and considerations suggesting that the amphibian embryo is normally partially anaerobic in the usual temperature range employed in physiological experiments are presented.
A detailed description of the respiratory and lactate level changes of embryos transferred to an oxygen atmosphere after anaerobiosis is given and the significance of the findings is discussed.
Copyright © 1955 by Company of Biologists
1955
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