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Monday, January 8th, 2007

    Time Event
    4:00p
    In What Ways Does The Human Body Uphold Normal Blood Pressure?

    The Human Body has actions to alter or maintain blood pressure and the flow of blood. Special sensors found in the walls of the heart and the arteries may sense the BP. Such special sensors are called baroreceptors. The Baroreceptors sense Blood Pressure and then send signs to the heart, the arterioles, the veins, and the kidneys which force these organs to form changes which decrease or increase BP. There are several techniques in which blood pressure can be regulated:


    Increased speed of heart may lead to the more quick contraction of heart and give out more blood. Ultimately, hypertension as both of these responses elevate the flow of blood into the arteries.


    The veins can expand and narrow. At the time of expansion of veins just small amount of blood reach to the heart as more of it get reserved in the veins. Finally BP gets lower as heart pumps less amount of blood. But, When the veins narrow, less blood is collected in the veins, more amount of blood comes back to Heart in order to pump into the arteries, &, thus, the heart pumps more blood & blood pressure is elevated.


    The arterioles accomplish 2 movts narrowing & expansion. In case arterioles expand BP lowers due to less resistance to the flow of blood and when arterioles shrink blood pressure shoots up because of increased resistance to the flow of blood.


    Decreasing or increasing urine amount may even symbolize the changes in blood pressure. Urine is basically amount of water that is removed from the blood thus if the kidney creates further urine amount, amount of blood which fills the arteries and veins goes down, & it decreases blood pressure.

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