. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 404 E. GELLHORN ture of the muscle. In this experiment the muscle remained during the first three recovery periods in a moist chamber and therefore did not show a recovery contracture; after the fourth stimulation period it always remained in Ringer's solution during the recovery period. The ect is very significant. The long period in air influenced the be- havior of the muscle so that one recovery period in Ringer's did not immediately bring about the contracture. Therefore it is not notice- able in experiment c, but it bec


. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 404 E. GELLHORN ture of the muscle. In this experiment the muscle remained during the first three recovery periods in a moist chamber and therefore did not show a recovery contracture; after the fourth stimulation period it always remained in Ringer's solution during the recovery period. The ect is very significant. The long period in air influenced the be- havior of the muscle so that one recovery period in Ringer's did not immediately bring about the contracture. Therefore it is not notice- able in experiment c, but it becomes apparent in / and still more in g. Tin- time during which the muscle was kept in Ringer's solution before the experiment was started is not immaterial to its reaction in reference to the recovery contracture. Thus it was found that soaking tin- muscle for 24 hours in Ringer's solution increases its tendency to react with recovery contracture even if the muscle is kept in a moist chamber during the recovery period. This may be illustrated by Fig. 8. The first curve showed a typical although very slight recovery. I [G. x. Both s;irtorii soaked for 24 hours in Ringer's solution. First muscle immediately thereafter stimulated .i> in Fig. 1, the second muscle remained one hour in moist chain! ><T lie-tore stimulation. Muscles in moist chamber during recovery period, ^-curves reproduced. <•< nit met ure. Hut the contracture was still smaller in the see. mil sartorius of the same frog, which was held in a moist chamber for one hour l)elre start ing the stimulation. It was, of course, also soaked for 24 hours in Ringer's solution. Besides, the second muscle shows but i ilei ic,isc in the elastic vibrations during contracture while the first one «lid not show them at all. This indicates, as was proven by •• a fasl re\ olving kymograph, that in the first case the < "Hi rat t ute was at ipanied by the occurrence of the " Funke's nose," which di


Size: 2098px × 1191px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology