. A text-book of physiology : for medical students and physicians . a of the operation asmade by Pawlow to isolatea fundic sac with its bloodand nerve supply unin-jured. The normal gastric se-cretion is a thin, colorlessor nearly colorless liquidwith a strong acid reaction and a characteristic odor. Its spe-cific gravity varies, but it is never great, the average being to Upon analysis the gastric juice is found to containsome protein, some mucin, and inorganic salts, but the essentialconstituents are an acid (HC1) and two or possibly three enzymes,pepsin, rennin, and lipase.
. A text-book of physiology : for medical students and physicians . a of the operation asmade by Pawlow to isolatea fundic sac with its bloodand nerve supply unin-jured. The normal gastric se-cretion is a thin, colorlessor nearly colorless liquidwith a strong acid reaction and a characteristic odor. Its spe-cific gravity varies, but it is never great, the average being to Upon analysis the gastric juice is found to containsome protein, some mucin, and inorganic salts, but the essentialconstituents are an acid (HC1) and two or possibly three enzymes,pepsin, rennin, and lipase. Satisfactory complete analyses of thehuman juice have not been reported, most of the recent observersconfining their attention mainly to the degree of acidity anddigestive power. More complete data are published for thesecretion in dogs. According to Rosemann,* the secretion inthis animal has a specific gravity of 1002 to 1004 and per cent, of dry material, of which per cent, is ash.* Rosemann, Archiv f. d. ges. Physiologie, 118, 467, Fig. 294—To show Pawlows operation formaking an isolated fundic sac from the stomach:v. Cavity of the stomach; s, the fundic sac, shut offfrom the stomach and opening at the abdominalwall, a, a; b indicates the line of sutures.—(Paw-low.) 772 PHYSIOLOGY OF DIGESTION AND SECRETION. Analysis of the ash shows that it contains 24 per cent, of potas-sium, 19 per cent, of sodium, and per cent, of calcium. TheHC1 amounts to per cent. This author states that in oneanimal during a secretion lasting 3j hours about 5 gm. of chlorinwere given off in the secretion in the form of chlorids, an amountabout equal to that contained in the entire blood. The organicportion of the secretion, in addition to the digestive enzymes,consists chiefly of protein. Gastric juice does not give a coagulumupon boiling, but the digestive enzymes are thereby of the interesting facts about this secretion is the way in whichit
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