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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.
Classification of Freshwater Ecosystems Fresh water ecosystems depend on the terrestrial ecosystems for large quantities of organic and inorganic matter which are constantly a
Define the meaning of value - Soil Value refers to relative lightness or darkness of a colour and is a measure of the amount of light that reaches the eye under standard lighti
Explain about the Zinc Toxicity? Only a few occurrences of acute zinc poisoning have been reported. The toxicity signs are nausea, vomiting, diarrhoea, fever and lethargy and h
Criteria of Essentiality Amon and Stout as early as 1939, suggested certain criteria that an element must fulfil in order to be classified as essential. These criteria are lis
Explain the Mendel's Laws in genetics? Based on the results of his experiments, Mendel proposed three laws regarding the inheritance of traits: the Law of Segregation, the Law
Q What are the major classes into which the phylum is divided? What are the few examples of each and in which form (polyp or medusae) are they found? Coelenterates are divided
Q. Can the heat capacity of water be taken small or large ? What is the biological importance of that characteristic? Ans. From Thermology it is define that the quantit
Define need of vitamin E and K during pregnancy period? Vitamin E needs are believed to increase during pregnancy but deficiency in humans rarely occurs. Vitamin E in the infan
Relation between taxonomy and ecology
How much Fluids should be taken for management of obesity? Liberal amounts of water and zero/low calorie fluids may be included in the diet. It may be helpful to have a glass o
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