Kirkes Handbook of Physiology

Kirkes Handbook of Physiology

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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. 1922 edition. Excerpt: ...the characteristics of the living protoplasm of the epithelial cells themselves. When isotonic blood serum is introduced into the intestine the salts and water are at once absorbed, also the albumins, but more slowly. In this experiment the osmotic conditions are in balance and the pressure is greater on the side of the blood vessels, so that absorption takes place with the actual expenditure of energy. The important fact here is that the absorption through a living membrane is influenced by the membrane in ways that we cannot yet explain. It is this factor which determines the different rate of absorption and the so-called selective absorption in different regions of the alimentary canal. As a rule, the current of absorption is from the stomach or intestine into the blood; but the reversed action may occur, as, for example, when sulphate of magnesium is taken into the alimentary canal. In this case there is a rapid discharge of water from the blood vessels into the canal. The rapidity with which matters may be absorbed and diffused through the textures of the body has been found by experiment. It appears that lithium chloride may be diffused into all the vascular textures of the body, and into some of the non-vascular, as the cartilage of the hip-joint, as well as into the aqueous humor of the eye, in a quarter of an hour after being given by way of the mouth and on an empty stomach. Lithium carbonate, when taken in fiveor ten-grain doses on an empty stomach, may be detected in the urine in five or ten minutes; or, if the stomach be full at the time of taking the dose, in twenty minutes. Absorption in the Mouth.--The epithelial lining of the mouth is of the thicker stratified type and the conditions are otherwise unfavorable for absorption....show more

Product details

  • Paperback | 318 pages
  • 189 x 246 x 17mm | 572g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236596528
  • 9781236596529