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Prostaglandins and the structurally associated molecules prostacyclins, leukotrienes and thromboxanes, are called as eicosanoids because they having 20 carbon atoms. These hormones are associativaly short-lived and thus act locally near to their site of synthesis in the body. They are derived from the common precursor arachidonate described in the figure. This polyunsaturated fatty acid is a derivative of linoleate .The Prostaglandins encourage inflammation, modulate synaptic transmission between nerve cells, and induce sleep. Whereas aspirin (acetylsalicylic acid) has been used for centuries to reduce inflammation, fever and pain, it was not until year of 1974 which John Vane discovered how aspirin works. Aspirin hold back the synthesis of prostaglandins by irreversibly inhibiting prostaglandin synthase. This enzyme catalyzes the first phase in the synthesis of prostacyclins and thromboxanes, prostaglandins.
Figure: Biosynthetic relationship of the eicosanoids.
Birth control pills maintain a high blood level of estrogen and progesterone. What is happening in the ovary when the blood level of estrogen is high? How is the uterus responding?
which is the molecular basis of inheritennce
How different are gymnosperms from pteridophytes and bryophytes? Gymnosperms are not cryptogamic as pteridophytes and bryophytes are. They are phanerogamic and so they form see
Nekton - Aquatic Ecosystem This group contains animals which are swimmers. The nektons are relatively large and powerful as they have to overcome the water currents. The anima
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What is cell biology? Cell biology is the science of studying how cells function like as their reproduction and metabolism, their internal and external anatomy.
Antimicrobial prophylaxis Antimicrobial prophylaxis is generally not indicated for cardiac catheterization, varicose vein surgery, most dermatologic and plastic surgery, arteri
#question.why are active cells small .
Iodine deficiency Iodine is an important component of thyroid hormones, which play active role in several physiological process such as control of basal metabolic rate, oxidat
Q. What is nuclear pollution? The Nuclear pollution consists of radiations emitted from atomic nuclei, these radiations are highly injurious to living beings and they can be or
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