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An adequate level of pressure is needed in the arteries to keep the blood flowing through the cardiovascular system. The chief determinant of arterial pressure is the volume of blood in the arteries and the important determinants of this are the cardiac output and the peripheral vascular resistance. The resistance offered by the arterioles accounts for almost half the total resistance in the systemic circulation. The muscle in the arterial wall allows them to constrict or dilate. When they constrict, the resistance increases and the blood pressure increases. The vasomotor centre in the medulla when stimulated sends impulses via the sympathetic to the smooth muscle in the arteries, arterioles and veins which results in their constriction.
Q. What is ST depression at rest? As early as 1965 Ostrand called attention to the syndrome of short PR interval without accelerated conduction and it's association with ST dep
Which two gases are exchanged when living organisms breathe? Oxygen and carbon dioxide are the gases exchanged when living organisms breathe.
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A decrease in parasympathetic discharge to the heart leads to A. a decrease in the conductance of F-channels in SA node cells. B. an increase in the conductance of potassium
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Q. Nutritional management of steatorrhoea? The Nutritional management of steatorrhoea should focus on the following: • Plenty of rest and relaxation and avoid stress •
why is epidermis peeledsuggest why a marine amoeba does not have a contractile vacuole
Carbon is important constituents of all organic compounds. It forms 49% of dry weight of the organisms. Earth atmosphere contains 0.03% carbon dioxide gas. The c
STRUCTURE Mitochondria is a double unit membranous structure. It consists of outer & inner membranes. Outer membrane is smooth & made up of lipoproteins. It bears m
F u n g a l diseases A spergillosis Aspergillosis is mycotic disease of poultry and all other species of birds caused by a fungus known as Aspergillus fumigatus . F
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