The Journal of General Physiology, Vol 7, 571-579,
Copyright © 1925 by The Rockefeller University Press
THE TEMPERATURE CHARACTERISTIC FOR PHARYNGEAL BREATHING RHYTHM OF THE FROG
W. J. Crozier 1 and
T. B. Stier 1
1 From the Zoological Laboratory, Rutgers University, New Brunswick.
The frequency of the pharyngeal respiratory rhythm of frogs exhibits a critical thermal increment µ = 8,800 calories. At about 15° irregularities are apparent, which may be reduced by continued adaptation to room conditions. The frequency depends upon a process possibly synaptic in locus and apparently belonging among the group of respiratory reactions. Its temperature characteristic sharply separates this process from those reactions known to be catalyzed by H ion.
Accepted on January 26, 1925