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When blood vessels dilate, there is a decrease in resistance to blood flow and blood is shunted to that part of the circulation. In addition, there is a decrease in pressure in the vasculature so that if the dilation is widespread, blood pressure falls. Blood vessels dilate because of decreased contraction of the smooth muscle cells that make up the medial layer of the vessel wall. This can be caused by release of dilating substances from the inner (endothelial) layer or from a decrease in the level of constricting substances such as norepinephrine from nerves or angiotensin in the blood. Many antihypertensive drugs work by causing dilation.
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What is vasodialation?
Briefly, it means when the blood vessels of the body dialate (get larger in diameter).
What happens to the blood vessels in elderly women?
The blood vessels decay
What happens to blood vessels when the temperature rises?
Blood vessels vasconstrict
Blood vessels help regulate your body's temperature when it's hot your blood vessels do what to increase blood flow and release heat?
Blood vessels dialate (open more) and the heart rate increases to dissipate body heat. In cold temps such as hypothermia, the blood vessels constrict and the heart rate lowers. Extremehypothermia or hyperthermia are both life-threatening.
Why does your pulse rate increase in warm climates?
When it is warm outside your blood vessels near the skin dialate to release the heat from your body to maintain homeostasis. The dialation of blood vessels causes an increase in blood flow which causes an increase in your pulse rate.
What happens when blood vessels not work?
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What happens when blood vessels weaken?
Some weakened blood vessels will swell or worse they can break. If the break happens in the brain a type of stroke can occur.
What do phagocytes do to bacteria?
They engulf it! When you get a cut, your bloodvessels dialate and the white blood cells (phagocytes) will leak from the nearest blood vessels and eat the bacteria near the cut. i think it has to do with innate immunity or imflammatory response
What happens to blood when it is pumped into the thin blood vessels of the lungs?
When blood is pumped into the thin-walled blood vessels of the lungs, carbon dioxide is replaced with oxygen.
What happens to blood when it is pumped into the thin-walled blood vessels of the lungs?
When blood is pumped into the thin-walled blood vessels of the lungs, carbon dioxide is replaced with oxygen.
What happens to blood when it is pumped into the thin walled blood vessels of the lungs?
When blood is pumped into the thin-walled blood vessels of the lungs, carbon dioxide is replaced with oxygen.
When you shiver what happens to your blood vessels near to your skin?
you get goosebumps.
