Doc2378
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Well?
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| skyhigh
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I think splanchnic blood flow increase leads to increase in cardiac output
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| sarika
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i think peripheral vascular resistance
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| skyhigh
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maybe c, i think you're right
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| DrVirgo
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 B???
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| sturge_weber
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c, not sure
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| reet
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incresed splanchnic blood flow. demand in severe anemia???
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| Doc2378
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Ok, the given answer is A.
I too thought it would be C since we have a decrease in the viscosity here but the logic given is anemia -> hypoxia-induced vasodilation
I think that makes sense...well?
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Courage does not always ROAR. Sometimes courage is the quiet voice at the end of the day saying, "I will try again tomorrow" - Mary Anne Radmacher
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| doc179
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yes , arteriolar diameter is increased cos of hypoxia , and that causes increased splanchnic blood flow by increasing cardiac output. peripheral vascular resistance can not increase in sever anemia
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| doc179
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blood viscosity is decreased in anemia
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| DrVirgo
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I know. Doesn't decreased viscosity increase flow?
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| reet
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SO,,, WHT CAN CAUSE ARETEROILAR DIAmeter INCREASE IN ANEMIA????? whts mechanism here
increase in splanchnic blood flow can also be thr right choice??
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| doc179
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tissue hypoxia causes vasodilation
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| doc179
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what I think is....among the choices there are just 2 things which increase arteriolar diameter and splanchnic blood flow ..and the blood flow increases because of increased arteriolar diameter and decreased resistance so the ans is A
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| drswapna
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In severe anemia, diminished transport of oxygen in the blood leads to hypoxia in the tissues. The hypoxia (compare to choice E) causes small arteries and arterioles to dilate, which allows greater-than-normal amounts of blood to return to the heart. In severe anemia, the viscosity of blood (choice B) may decrease by 50% or more because blood viscosity depends largely on the concentration of red blood cells. This decrease in viscosity lowers the resistance to blood flow in the peripheral tissues (i.e., decreases peripheral vascular resistance, choice C) allowing even greater amounts of blood to return to the heart.
Blood is often shunted away from the splanchnic vascular bed (choice D) in anemia, which can cause gastrointestinal problems.
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| guangyu
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resistance=viscosity/r
so i think in anemia decrease viscosity decrease restance.
i still dont know what's wrong with c?
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