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Explain about the Intestinal calcium absorption?
Intestinal calcium absorption is mainly controlled by the serum concentration of 1, 25- (OH)2D as discussed above. The activity of the 1-α-hydroxylase, which catalyzes 1, 25-(OH)2D production from 25-hydroxyvitanlin D (25-OH-D) in the kidneys, is negatively related to plasma calcium and phosphate concentrations and positively related to plasma parathyroid hormone concentrations. Thus, the inverse relationship between calcium intake and fractional absorption described above is enhanced by the inverse relationship between dietary calcium and serum 1, 25-(OH)2D. We will learn about this aspect later in this section under the heading regulation of Ca concentration.
Most of the surface water originates directly from precipitation in the form of rainfall or snow. Ground water from springs also contributes to the flow of most of the streams. The
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Drugs for hepatitis B Chronic HBV infection is currently treated with interferon alfa, lamivudine or adefovir. Lamivudine is much better tolerated than interferon and much les
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Q. Balloon Aortic Valvuloplasty for aortic stenosis? This is the procedure of choice in children and young individuals where the valve is not calcified. In elderly patients wit
Two adaptation of the skin against attack by micro-organisms
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