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The Journal of General Physiology STLrDIES O N R_ESPIIIATIOI~. XVII perhaps be explained as a purely mechanical disturbance due to the great differences in osmotic pressure as the result of which the tissue must remain about 30 minutes in normal sea water before the readjustment is complete. Fig. 2 shows t h a t the effects of strongly hypotonic sea water are similar to those of strongly hypertonic, except t h a t the lowering of respiration is not so pronounced. Here also we observe all degrees of recovery depending on the length of exposure to the solution. /I / / ! wo k~'~,.~" .... ~_ ...... IZ _'__-Z---22 io I-IOURS ~b FIo. 1. Curves showing rate of respiration of Laminar~ (expressed as per cent of the normal). The normal rate represents a change from pH 7.78 to 7.36 in from 1] minutes to 2 minutes, depending upon the amount of material used. The solid lines show rate of respiration while tissue was exposed to hypertonic sea water (sp. gr. 1.130, ,x = - 9.37 approximately). The dotted lines show stages of recovery after the tissue was put back in normal sea water. Each curve represents a typical
The Journal of General Physiology – Rockefeller University Press
Published: May 1, 1921
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