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Q. Investigation of aortic regurgitation by Chest X–Ray?
Left ventricular dilatation produces cardiomegaly on chest radiograph. Ascending aorta is often prominent. Egg shell calcification of ascending aorta suggests Leutic etiology while widened mediastinum makes one suspect aortic dissection. Valve calcification is better seen on fluoroscopy. With left ventricular failure obvious radiological signs may emerge. Mild or even moderate aortic regurgitation may produce no radiological signs.
Respiratory Gases -Respiration Physiologically the most important gases are oxygen, carbon dioxide and nitrogen. Molecular oxygen comprises 21% of the atmosphere; carbon diox
Classification of Viruses No evolutionary or phylogenetic exist between viruses. A nature system of classification cannot, therefore, be devised for viruses. Holmes (1948)
How does the sexual arousal mechanism in women facilitate fecundation? During sexual arousal in women the vagina secretes substances to neutralize its acidity therefore allowin
What is gluconeogenesis? Highlight its significance giving any two examples Gluconeogenesis (i.e synthesis of new glucose) is the synthesis of carbohydrate from non-carbohydrat
While studying evolution, a student comes across a cladogram that includes clades like amphibia, reptilia, aves, and mammalia. What must be the basal clade?
Basic Research Terms: Some of the basic terms that are defined in this section are: Assumptions Operational Definitions Variables Delimitation and Limitation H
It is generally believed that genetic drift occurs as a result of sampling error. As we said earlier it occurs in small populations such as peripheral isolates. We may demonstrate
Three charges are arranged as shown in the figure below. Find the magnitude and direction of the electrostatic force on the charge q = 4.78 nC at the origin. (Let r12 = 0.260 m.)
EMBRYONI C MEMBRANES - Such animals are called amniota. Embronic membranes are of 4 types - (i) Yolk sac - It is formed below the embryo. It contains fluid (no yolk
Q. How is the depolarization of the neuronal plasma membrane generated? How does the cell return to its original rest? When the neuron receives a stimulus by the permeability o
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