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Baroreceptor activity affects coronary vascular resistance reflexly. With carotid occlusion, baroreceptor hypotension leads to reflex adrenergic stimulation, increased metabolic activity and secondary vasodilation. When this is prevented by beta blockade, reflex coronary vasoconstriction secondary to carotid hypotension is unmasked. Alpha1 adrenoreceptor stimulation is capable of causing epicardial vasoconstriction in ischaemic myocardium, thereby influencing favourably the transmural distribution of blood flow to the subendocardium during exercise. Activation of chemoreceptors initially causes coronary dilation, a reflex that is mediated by vagi and can be abolished by atropine e.g. Bezold Jarisch reflex.
What do you mean by Cold Deserts? Cold deserts cover a vast area north of the Himalayan ranges forming an ecosystem with exceptionally low temperatures which may reach - 75°C a
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Describe Pericardial Rub and their Characteristic ? Generation of sound: The sound is generated due to rubbing of visceral and parietal pericardial surfaces against each other
Microbodies Peroxisomes and glyoxysomes are microbodies formed from ER which superficially resemble the lysosomes. Peroxisomes are spherical bodies limited by a single membrane
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Food Intolerances Food Intolerances: The intolerances of the patient for specific food items must be assessed. For example, milk may lead to diarrhoea in some people whil
1. Road traffic: of all the sources of noise pollution, road traffic is the most prevalent and perhaps the most damaging source of pollution. More people are exposed to noise
Explain the Bacillus - Characteristics of Bacteria? Bacillus - It is gram positive, endospore former, obligate aerobic or facultative aerobic rods belonging to order Bacilliale
Define Difference between Plant Systematic and Taxonomy? Before coming to principles of taxonomy let us discuss the difference between taxonomy and systematic. Systematic is th
Q. What are the reticular fibers of the connective tissue and where they can be found? The reticular fibers are especially delicate interstitial fibers made of a special kind o
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