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Kaplan Qbank USMLE



Author7 Posts
  #1

which one of the following decreases during aerobic excersice

skintemp/mean art.blood press/circulating blood volume/heart rate/cerabral blood flow.

tha answer is circulating blood volume.can some one pls explain!!

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  #2

no way, how can circulating blood volume be reduced??? aerobic excercise is one instance in which all the reservoirs release blood into systemic circulation because of increased sympathetic discharge! besides increase circulating blood volume also is one factor tht contributes to increase in cardiac output!

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  #3

exactly ssrpk, to my knowledge blood from veins moves to systemic circulation and increases blood volume.
but the explanation they offered is due to increased capillary pemeability and incresed filtration blood volume is decresed! strange explanation.lets hear from leopard ,what he says.

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Dont worry.Nobody knows 100%

  #4

Blood volume may decrease

Two possiblities may during vigorous exercise
  1. Sweating and perspiration with water losss from lungs
  2. Exudation of fluid from capillaries of muscles due to excessive vasodilation due to local metabolites.

Just a guess but I want to know exact answer.

Best of luck


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  #5

answer is in the question.reduced blood volume

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  #6

thanks for the explanation,loepard.
btw when r u taking stp 1?

___________________
Dont worry.Nobody knows 100%

  #7

yes it may be decreased ,

1.due to local metobolite

2.excessive sweeting








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