File:Elementary exercises in physiology (1921) (14801911203).jpg

Identifier: cu31924001040173 (find matches)
Title: Elementary exercises in physiology
Year: 1921 (1920s)
Authors: Fish, Pierre A. (Pierre Augustine), 1865-1931
Subjects: Physiology
Publisher: Ithaca, N. Y., Comstock Publishing Co.
Contributing Library: Cornell University Library
Digitizing Sponsor: MSN

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the spectrum is asdistinct as it can he made. Hold the spectroscope so that the red isat the left of the field. Dip a wire into some water, and then intosome salt or sodiiun carbonate, and hold it in a flame of a fish-tailburner. Note the change in the spectrum. 236. Arrange the apparatus with the aid of a demonstrator, sothat the spectroscope, gas-flame and substance to be examined, arein their proper relations. Half fill the vial or test tube withdefibrinated blood. Nothing can be seen until the blood is properlydiluted. Continue diluting until two bands of oxyhemoglobinappear in the spectrum. Note their position, and which one dis-appears first when the solution is diluted far enough. 237. Add a drop or two of ammonium sulphide solution orStokes fiuid to reduce the oxyhemoglobin. Note the result. 238. Pass some illuminating gas through some blood for a con-siderable time. Examine with a spectroscope. • Add a drop or twoof ammonium sulphide or Stokes fluid. Compare this with 235.
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Fig. 2. The diagram at the left ^hows the appearance of the Wood afterfasting when only a few chylomicrons are present.. Tlie diaigram at the rightshows chylomicrons in great numbers after the digestion and absorption of fat.(Gage). 63 ^39. Appearance of blood with the darkfield microscope. Thered and white corpuscles are clearly visible as objects reflecting thelight strongly but without color. If the blood be observed after ameal, containing fat, has been digested, there will be seen a verygreat number of minute particles or chylomicrons (Gage). Thesewere formerly called hemoconia or blood dust. Recent evidencehas shown that they are associated with fat absorption and have norelation to broken down blood elements or debris. A strictly proteindiet or a strictly carbohydrate diet contributes nothing to thepresence of the chylomicrons in the blood, but a fat diet causes avery marked increase in their number. After fat absorption hasoccurred the greatly increased number of chylomicrons

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