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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.
The pancreas produces insulin, a hormone that is specifically produced in the beta cells of the pancreas and it is responsible for the regulation of blood glucose. After carefull c
Caryopsis - Development of Fruit In cereals each carpel has one ovule and therefore the mature fruit has, just one seed. During maturation, very little or no cell divisions ar
Q. Concept of Development of binomial nomenclature? Name is a conventional tool to act as means of reference. For example, when we say chimpanzee, sparrow, paddy, virus, we mea
Explain Senning Procedure ? Operation is performed by ascending arteries and separate SVC and IVC cannulation. If the operation is done under deep hypothermic circulatory arres
Which of Mendel's postulates can only be demonstrated in crosses involving at least two pairs of traits? a) Segregation b) dominance/recessiveness c) independent assortment d) unit
Q. What are the main respective constituents of cell walls in bacteria, protists, fungi and plants? In bacteria the cell wall is made of peptidoglycans, amongst protists algae
Define Precautions for Preparation of Phosphate Buffers? 1. Glass electrodes should always be dried before and after measuring pH with a tissue paper. 2. The pipettes should
Q. What is Biological Contaminants? You may recall reading about food borne diseases caused by the consumption of contaminated food items in the last unit. In the
The cell cycle undergoes a sequence of changes which involve a period of growth replication of DNA, Followed by cell division. This sequence of changes is called cell cycle.
Isoniazid Serum aminotransferase activity increases in 10% to 20% of patients taking isoniazid, especially in the early weeks of treatment, but often returns to normal even wh
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