The branchial plumes of Chromodoris respond, by contraction, to a decrease in light intensity. This response is obliterated by high temperatures (above 32°) and by direct sunlight, and is possible only within a limited range of alkalinity of the sea water. A concealing retraction of the whole gill-crown is reflexly determined by the self-contraction of the individual plumes under "optimal" conditions of light, temperature, and alkalinity. This protective response of the branchiæ is superimposed upon their simple system of fundamental activities (protrusion, retraction) apparently concerned with regulating the respiratory exchange of the nudibranch.
Article| July 20 1919
ON THE CONTROL OF THE RESPONSE TO SHADING IN THE BRANCHIÆ OF CHROMODORIS
W. J. Crozier
Contributions from the Bermuda Biological Station for Research, No. 106, and from the Physiological Laboratory, College of Medicine, University of Illinois.
Received: April 28 1919
Online Issn: 1540-7748
Print Issn: 0022-1295
Copyright, 1919, by The Rockefeller Institute for Medical Research
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W. J. Crozier; ON THE CONTROL OF THE RESPONSE TO SHADING IN THE BRANCHIÆ OF CHROMODORIS . J Gen Physiol 20 July 1919; 1 (6): 585–591. doi: https://doi.org/10.1085/jgp.1.6.585
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