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Explain the Radioactive Red Blood Cells
In order to make red blood cells radioactive, tagging of red blood cells with radioactive chromium (51cr) is done. A small quantity of 51cr is mixed with a few milliliters of blood removed from the person and this is incubated at 36°C for half an hour or more. After this time, most of the 51cr will have entered the red blood cells, but to remove the extra chromium from the mixture, the red blood cells are washed with saline. The total content of 51cr is then determined with a Geiger or scintillation counter (apparatus for measuring the total number of radioactive disintegrations occurring in the sample per minute). Then the radioactive cells are re-injected in the person. After mixing in the circulatory system for approximately 10 minutes, blood sample is taken from the circulatory system, and the radioactivity in this blood is determined, using dilution formula given above in dilution principle. Then actual volume is calculated i.e.
Actual blood volume = 1.1 x Measured blood volume
How is life originated ?
Advantages of Proteins Proteins are compounds of carbon, hydrogen, oxygen and nitrogen. On an average, proteins contain 16% nitrogen. Most proteins also contain sulphur and
Germinating pollen grains Apparatus Used-Make a strong sugar solution and place it in a shallow dish like a saucer or Circular Plate. Shake pollen from several Different kinds
Explain Antibodies and Clotting - Functions of Plasma Proteins Antibodies: Plasma proteins belonging to the class of y-globulins act as antibodies, which protect us from infect
How soil textural classes categorised and what are is their significance? The soil textural classes are based on the percentage of the separate(s) which contributes maximum to
Magma that reached the Earths surface is known as: Lava
advanced in live zoology
Explain the Apnoea Apnoea means cessation of breathing. Temporary apnoea may be seen in low carbon dioxide tension in blood. During swallowing, there is a temporary apnoea.
how to show air contains carbon dioxide
Explain the Normal Constituents of Urine The normal constituents of urine are of two types. These are the organic substances and the inorganic substances as listed Organic
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