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  #1  
Old 06-22-2011
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Kidney Heat stroke/Dehydration/Renal physio Q

A 28-year-old man is brought to the emergency department because of blurred vision, fatigue, and sever thirst 20 minutes after being found wandering along a deserted farming road. He reports that his car had run out of gas 3 hours ago, and he had walked approximately 7 miles toward his destination without water or shade from the intense summer heat. his current body weight is 92% of the value listed on his driver's license. His temp is 103.8, pulse 105, bp 95/60. Physical exam shows pale, dry skin. He is occasionally incoherent. IV fluids are administered and within 60 mins the pt is able to take fluids by mouth and provides additional info about his next of kin before falling asleep. At the time the man was found on the road which of the following physiologic parameters would have been decreased compared to normal values?

A. Plasma renin activity
B. Renal B-adrenergic receptor stimulation
C. Renal arteriolar perfusion pressure
D. Renal symp nerve activation
E. Serum AT II conc
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  #2  
Old 06-22-2011
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C.........?
dehyration---> low renal arteriolar perfusion pressure---. increasees renin----thus increase Ang I to II ---increase aldo---increase vasocontriction...

hmm well it cant be that straight forward, pblly somethign else lol
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Old 06-22-2011
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Quote:
Originally Posted by step1saga View Post
C.........?
dehyration---> low renal arteriolar perfusion pressure---. increasees renin----thus increase Ang I to II ---increase aldo---increase vasocontriction...

hmm well it cant be that straight forward, pblly somethign else lol
It is C) Decreased Perfusion would cause all of the other options to go up
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Old 06-22-2011
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C.. reduced renal perfusion
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Old 06-22-2011
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At the time the man was found on the road which of the following physiologic parameters would have been decreased compared to normal values?

A. Plasma renin activity = increase
B. Renal B-adrenergic receptor stimulation = increase
C. Renal arteriolar perfusion pressure = decrease (Vc of afferent arteriole)
D. Renal symp nerve activation = increase
E. Serum AT II conc = increase (renin should be increase)
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Old 06-22-2011
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A. Plasma renin activity
B. Renal B-adrenergic receptor stimulation
C. Renal arteriolar perfusion pressure
D. Renal symp nerve activation
E. Serum AT II conc[/QUOTE]

C. Renal arteriolar perfusion pressure
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  #7  
Old 06-23-2011
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i agree with c. thought of it the exact same way step1saga did.
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Old 06-23-2011
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waoo great question
it remind me physio class @ kaplan..
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Old 06-24-2011
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renal art perfusion prssure
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Old 06-24-2011
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its C ...chould b the choice
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Old 06-24-2011
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maybe C!!!
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Old 06-24-2011
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yup C it is!
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