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Define role of Leptin in controlling gene expression?
Leptin is a protein product (containing 167 amino acids) of the ob gene expressed exclusively in the adipose tissue. This protein molecule functions as an afferent signal in a negative feedback loop, centred in the hypothalamus, regulating the size of the adipose tissue mass.Leptin has been shown to modulate the synthesis of neuropeptides, particularly Neuropeptide Y (NPY) that regulates food intake. Increases energy expenditure as indicated by animal experiments. Leptin induced weight loss is completely specific for adipose tissue. While feeding does not appear to modulate leptin expression, fasting acutely decreases plasma leptin concentration. In general, obese humans have high leptin levels and the available data suggest that human obesity is likely to be associated with insensitivity to leptin.
Q. What is viscosity? Viscosity is resistance to flow of a liquid. It is a measure of the resistance of a fluid to deformation under shear stress. It is commonly perceived as "
T hese are some important uses of biodiversity. 1. Source of food, medicines and drugs: (a) Wheat, rice and maize are three carbohydrate rich crops and contribute
Crustacea - Feeding and Digestion in Arthropods Branchiopods (Anacostraca) give a good instance for filter feeding mechanism. The appendages are of foliaceous type (leaf-like)
Mr. Smith read that cholesterol was bad for his health so he eliminated all foods and food products containing this molecule. He later found that his cholesterol level dropped only
Q. Give Choice of Catheters for Ventriculography? 1) Pigtail Catheter: This catheter developed by Judkins has end hole and side holes. The end hole permits insertion of the c
Define Reagents for Measurement of pH? Buffer solutions of pH 4, pH 7 and pH 9.18 for calibration and an unknown solution (i.e. solution of unknown pH) You can prepare these
Define Fat requirements in human body? There is no change in fat digestibility at altitude of
Problem of Polarity in Regeneration in Planarians As in Hydra, flatworm regeneration as well appears to occur in a polar fashion. There seems to be ananterior-posterior gradie
what is allometry?
Origin of Regeneration Cells of Blastema The origin of the cells making the blastema in vertebrates has been investigated by various workers in the case of regenerating legs
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