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Q. Illustrate Pathology?
Following rheumatic fever, over next few years to decades, the typical funnel shaped mitral valve assumes a fish mouth appearance. During rheumatic fever endocardium of the leaflets gets inflamed, edematous and develops pin head vegetations at the tips or along the line of closure. These heal with fibrosis resulting in thickening of the leaflets with limited mobility. Some times there may be calcific deposits over the leaflets. The commissures get fused and in diastole the larger anterior leaflet pulls the posterior leaflet anteriorly. This decreases the valve opening in diastole. Thickened and fused chordae further limit the opening of the valve. Subvalvular apparatus, i.e., the chordae may fuse to such an extent that a secondary orifice may develop below the mitral valve limiting the diastolic blood flow. The abnormal valvular flows due to initial valvulitis may further worsen the thickening and fibrosis of the leaflets progressively. The progression may be rapid in some patients due to repeated attacks of rheumatic carditis, genetic or hormonal factors or due to increased hemodynamic load as seen in manual laborers.
Population was defined by Clarke in 1954. The term population refers to the total number of individuals of a sp. occupying a particular geographic aera at a given time. A s
Disaccharides can be understood as follows 1.Sugars made up of the two monosaccharides held together by the covalent bond; like sucrose and lactose . 2. Type of sugar (sacch
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Long ago, there lived an Australopithecus girl by the name of Lucy. She died 3.2 million years ago. There are a few molecules of Lucy’s carbon in YOU! Starting from the gaseous C
Q. What do you know about Cardiothoracic ratio? The cardiothoracic ratio (CTR) shown in figure is the transverse cardiac diameter (the horizontal distance between the most righ
Stomata can open and close in response to changes in the CO 2 concentration inside the leaf. Would you expect stomata to open or close if the CO 2 concentration decreased? Explai
Insulin, insulin syringe and insulin devices Insulin is the hormone used to treat diabetes mellitus. Insulin is given in the form of injection, because the gastro intestinal tr
The Cori cycle a) Pyruvate formed from glucose is converted to lactate by lactate dehydrogenase in the muscle cell. b) Lactate is released into the blood and taken up b
WHAT IS MEGASPOROGENESIS?wHERE IT OCCUR?hOW IT OCCURS?
Effects on Materials - Air pollutants Most air pollutants are reactive chemicals, so they react with most of the substances around. You may recall from your chemistry lessons
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