Vasoconstriction

... responds to really cold and really hot environments. So far I've done a bit of researching and reading on the topic and found little things like: vasoconstriction or vasodilation of arterioles and capillaries. However, does anyone know if there is more that I can do? How can I prepare for this ...

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... is vasodilatation, which causes nerves between capillaries pressed. Nerve endings for pressure and painful will send the information to the brain. Vasoconstriction can result in the same painful feeling as the supply of oxygen which is brought by RBC is decreasing.

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Im quite confused. Since the sympathetic nervous system causes the heart rate to increase (thus more blood is pumped round the body), why do the vessels vasoconstrict? Doesn't this cause the vessels to become narrow and thus less blood can flow? Id appreciate any help Thank you

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... a protien to the cardio-inhibatory centre of the medulla oblongata which will decrease the cardiac output. When the cause of hypertension is vasoconstriction, the target is the vasomotor centre. Impulses from the baroreceptors in artery walls stimulate this centre to send impulses along the ...

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There is a connection. In cases of hypothermia,people will have to urinate from cold diuresis. Vasoconstriction creates greater volume pressure in the blood stream. The kidneys pull off excess fluid to reduce the pressure. A full bladder is a place for additional heat ...

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