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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.
some deliveries of baby occur early na. y is it so?
what are the two main classes into which fish are divided
Conservation of biodiversity is very important to maintain the ecological balance of ecosystem. Various steps for conservation of biodiversity: 1. Creation of consc
How many kidney in man?
Explain the Diet Counseling for a successful weight reduction programme? As discussed above diet counseling is a very important aspect of a successful weight reduction programm
Q. Why is maternal milk important for the immune protection of the baby? Besides being nutritionally important like maternal milk participates in the defense of the baby agains
The Jones family was caught in a fire but escaped. Unfortunately the father and daughter suffered burns. The father had second degree burns on his chest, abdomen, and both arms, an
What is salmonella typhosn Typhoid is an enteric fever, which relates to acute infection of short duration. It is caused by bacteria called Salmonella typhosn about which
advantages of cuticle of anthropodes
Sarcodine protozoans are amoebas, and there are two types of them: shelled and naked. As you examine the prepared slides you should be able to see water expulsion vesicle, nucleus,
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