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Q. How to Investigate mitral stenosis by Echocardiography?
Echocardiography is diagnostic in mitral stenosis. There is varying degrees of thickening and calcification of leaflets with subvalvular fusion. Commissural fusion results in typical fish mouth appearance of mitral orifice as seen in para sternal short axis view. The same is responsible for anterior motion of posterior leaflet in diastole. Excursion of leaflets and E-F slope on M mode are decreased. Anterior mitral leaflet has a typical hockey stick appearance. Left atrium is enlarged and it becomes a source of clots. Morphological features of mitral valve are of importance in assessing the suitability of mitral valve for balloon valvuloplasty. These features are given in the table. A valve score less than 8 predicts a favourable outcome with balloon valvuloplasty, while a score more than 8 does not preclude valvuloplasty.
Q. How is extracellular digestion related to tissue and cellular specialization? A variety of specialized tissues and cells appeared with extracellular digestion to provide enz
The cell goes through many discrete phases before and after cell division. From this understanding, scientists then identified the four characteristic phases of the cell cycle:
Decomposers - Biotic Components Also known as saprotrophs. Mostly, these are microscopic and are heterotrophic in nature. Decomposer organisms obtain their energy and nutrient
What is the excitation threshold of a neuron? How does this threshold relate to the "all-or-nothing" rule of the neural transmission? The excitation threshold of a neuron is th
Which is the cell organelle that is specialized in aerobic respiration? The cell organelles that are specialized in aerobic respiration are the mitochondria. Cell Respiratio
Determine the nutritional needs of humans? In the previous unit, we saw how involvement in sport or vigorous activities can affect the body's nutrient needs. In this unit, we w
WHAT ARE STAKEHOLDERS?
1. DNA must be extensively folded in order to fit inside a nucleus that is less than 10 um in diameter. a. Describe how DNA is folded into chromatin structures of increasing com
Why is the human placenta referred to as haemochorial type? Name the hormone it secretes to facilitate parturition.
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