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Kaplan Qbank USMLE



Author8 Posts
  #1

A clamp around the renal artery is partially tightened to reduce renal arterial pressure from a mean of 120 to 80 mm Hg. How much do you predict RBF will change? A. 33% decrease B. Zero C. 5–10% decrease D. 33% increase

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Mr. Physiology. An answering machine.

  #2

A. 33% decrease

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FORUM RULES-- Those who believe in telekinesis, raise my hand. I get enough exercise just by pushing my luck --P4U World.." The pure and simple truth is rarely pure and never simple."

  #3

agree

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life is guud

  #4

Hi ssrpk, glad to see you, I used to reed all your post.

Sorry guys but this was my favorite question, not difficult but it looks simple and you might fall in the trick, is good to take 1-2 minutes for physio questions. The answer is C. Arterial pressure decreases by 33%, but autoregulation prevents the RBF from decreasing in direct proportion. Autoregulation is not perfect, so some decrease, but not 33%, will occur.


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Mr. Physiology. An answering machine.

  #5

damn i choose C first Think abt the Same reason but then Said a 33% decrease willl lead to lot less Autoregulation.

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FORUM RULES-- Those who believe in telekinesis, raise my hand. I get enough exercise just by pushing my luck --P4U World.." The pure and simple truth is rarely pure and never simple."

  #6

A concept a lot of people tend to forget: AUTOREGULATION. Asked in many ways in the boards.

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Mr. Physiology. An answering machine.

  #7

damn! autoregulation! of course!!

paganini, your qns are excellent! thanks. am learning a lot!


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Prepare as if you're the worst, Perform as if you're the best! As you dream, so you manifest. So, DREAM BIG!! When you face hardship, remember, God never gives you more than you can handle. Keep your face to the sunshine and you cannot see the shadows.

  #8

ok fine i just cudnt recall a proportionate rise.......
i was thinking about any formula???








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