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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.
It is important to recognise underlying causes and precipitating factors of heart failure for its appropriate management. That would also help in prevention and treatment of heart
Q. What are the periods of the second meiotic division? Meiosis II is divided into metaphase II, prophase II, anaphase II and telofase II.
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Define tracheal system in details. Respiratory system found in insects and some spiders where air passes directly to the tissues through a series of tubules. Since oxygen tran
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WHAT ARE SOME INFORMATION ABOUT HUMAN ZOOLOGY?
Why, even though they have an open circulatory system, can flying insects like flies beat their wings with great speed? In insects the circulatory system is open but this syste
In what ways does over-grazing lead to soil erosion? Over-grazing leads to erosion because (i) the animals delete all the vegetation, so exposing the soil to heavy rain, (ii) t
Explain the Centrifuge - Microbiological Apparatus and Equipments? Centrifuge is used for separating the substance in liquid or concentrating the microorganisms on the basis of
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