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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated.1891 Excerpt: ... SECRETION OF HYDROCHLORIC ACID. 77 an opportunity for the formation of free hydrochloric acid. Hydrochloric acid possesses a high diffusive power--it passes thirty-four times (Graham) as quickly through the dialyser as common salt; and this explains how, once formed as above in the blood, it may pass into the gastric juice in such large quantities as in fact we find it to do. The facts that we secrete acid urine and acid gastric juice are meanwhile divested of their strange characters by the aid of this simple process of diffusion; but the question why phosphatic salts are only diffused in the kidney, and hydrochloric acid in the stomach, and that indeed only periodically, must be left for the future to answer, as the hypothesis of Maly in support of his theory, that the peptic glands and also the kidneys and sweat glands constitute diffusion bodies, is still only a description of existing relations unsupported by any facts. These ideas have been also expressed by Heidenhain, but he has not named perhaps the most important difficulty, that of physically explaining the periodical secretion of hydrochloric acid, although in all other glands which secrete periodically, that is, through a special nerve stimulus, a specific secretion, we conclude that this is formed by the specific activity of the secreting cells, whilst the common source, the constituents of the blood serum, exhibit a very changing composition. Heidenhain asserts, on the faith of a discovery of Griitzner, according to which the amount of chlorides in the gastric mucous membrane is proportional to the amount of peptone, that the hydrochloric acid is separated from the chloride of sodium in the glands, by the aid of organic acids and even of lactic acid. Landwehr says the same, and derives the ne...
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