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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.
Microbial polysaccharides Many microorganisms produce polysaccharides that either remain attached to the cell wall (capsular polysaccharides) or are secreted into the extracel
It is a hemolytic disease, which makes in newborn. Maternal IgG antibodies cross the placenta and destroy the red bleed cells. This develops when an Rh+ expresses an Rh antigen on
Trichomoniasis Oral metronidazole has been the treatment of choice for trichomoniasis. Tinidazole (Tindamax - Medical Letter 2004; 46:70), a nitroimidazole similar to metronid
A plant grown from one of Mendel's yellow peas is selfed. Five progeny peas are obtained from this self and they are all yellow. If the original selfed plant had been homozygous, w
The part of human brain which is a significant relay station for the sensory impulses and also is the origin of many of the involuntary acts of eye such as narrowing of the pupil i
Explain about the Probiotics? A mono or mixed culture of living organisms, which when ingested in certain amounts, has a positive impact on host health, beyond conventional nut
Define Regulation and Excretion of sodium and chloride? Renal excretion and retention of these elements is closely regulated. The total content of body sodium especially the co
How ecosyestem concept is useful to the study of environment?
What is the action mechanism of the antiretroviral drugs called protease inhibitors which are used against HIV infection? Protease inhibitors are some of the antiretroviral dru
Q How do amoebae, paramecia and trichomonas respectively move? Amoebae move by amoeboid movements small invaginations and projections of their plasma membrane (pseudopods) that
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