American Journal of Physiology, 1909, Vol. 24 (Classic Reprint)

Angebote / Angebote:

Excerpt from American Journal of Physiology, 1909, Vol. 24 The effects of heat on striated muscle have received a great deal of attention and are described in detail in many of the text-books of physiology. The effects of heat on smooth muscle, on the other hand, have been little studied, Vernon has, however, given a more or less detailed account of the changes in length which take place in this tissue at various temperatures. Fig. I is a copy of two of Vernon's curves. The upper curve was obtained from the frog's gastrocnemius, and the lower one from a ring of the smooth muscle of the oesophagus of the same animal. The curves represent the changes in length which take place when the tissues are heated gradually from 20° C. to 90° C. in 0.7 per cent sodium chloride solution, the time required for the whole process was about thirty minutes. As is seen from the curves, the two tissues behave oppositely between about 40° and 50°, the striated muscle shortening in this interval and the smooth muscle lengthening almost as markedly. At about 53° both tissues shorten. Vernon has studied the changes in length which occur under the influence of heat in the striated and smooth muscle of a number of different animals. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.