The Essentials of Experimental Physiology, for the Use of Students
The book The Essentials of Experimental Physiology, for the Use of Students was written by author Thomas Gregor Brodie Here you can read free online of The Essentials of Experimental Physiology, for the Use of Students book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The Essentials of Experimental Physiology, for the Use of Students a good or bad book?
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In curve III. we have practically a repetition of curve II., but the second point of stimulation falls a httle earlier, f-^ths sec. after the first, and therefore nearer the commencement of the period of relaxa- tion. Again we find no true summation of height. The second contraction repeats the first, but starts with many fibres aheady con- 110 EXPERIMENTAL PHYSIOLOGY tracted. As in the previous curve the second is rather more rapid than the first contraction. Tiie apex times for the two are |-...|ths and f^ths sec. Curve IV. The second stimulation in this instance follows the first H ^^^^HB|' ' "'^'^H|I| l^^^^^^^^^^^^^^^^^l Fig. 92. — Tetanisation of a Frog's Ventkicle in Standstill by the Stannius Ligature. In i the Secondary Coil at 10 cms. ; in ii at 12 cms. ; in hi at 13 CMS. from the Primary. Magnification, 10. The Duration of Tetanisation is Indicated by the Short Vertical Marks under Each Tracing. after an interval of f^ths sec, i.e. at the end of the period of contrac- tion. We note the most striking result that no second contraction is produced.
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