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* NBME 12 block 4 answers
 #606659  
  laurier - 08/14/11 12:18
 
  Q 41- DD

Matrix metalloproteinases (MMPs) are a family of zinc-dependent endoproteinases whose enzymatic activity is directed against components of the extracellular matrix (ECM). MMPs facilitate tumor cell invasion and metastasis by at least three distinct mechanisms.

http://www.ncbi.nlm.nih.gov/pubmed/10357558
 
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* Re:NBME 12 block 4 answers
#2449592
  laurier - 08/14/11 12:19
 
 
Q39- AA

http://en.wikipedia.org/wiki/Lateral_rectus_muscle
 
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* Re:NBME 12 block 4 answers
#2449593
  laurier - 08/14/11 12:19
 
  Q-38 DDD  
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* Re:NBME 12 block 4 answers
#2449595
  laurier - 08/14/11 12:22
 
  Q- 37 AAA  
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* Re:NBME 12 block 4 answers
#2449597
  laurier - 08/14/11 12:24
 
  Q 36- CCC  
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* Re:NBME 12 block 4 answers
#2449599
  longhorns1 - 08/14/11 12:27
 
  http://usmleforum.com/files/forum/2011/1/599604.php  
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* Re:NBME 12 block 4 answers
#2449604
  laurier - 08/14/11 12:36
 
  Q35- CCC

ccording to the CT, they insert the tube laterally to the thorax,

http://fr.wikipedia.org/wiki/Fichier:Serratus_anterior.A.png
 
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* Re:NBME 12 block 4 answers
#2449605
  laurier - 08/14/11 12:41
 
  34- BBB

When carbon dioxide levels fall as the blood passes through the lungs, bicarbonate levels fall in the serum because the equilibrium shifts to replace CO2, and consequently bicarbonate in the red blood cells will move out into the serum. To balance the charges when bicarbonate exits the cell, a chloride anion from the plasma enters the red blood cell.

http://en.wikipedia.org/wiki/Chloride_shift
 
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* Re:NBME 12 block 4 answers
#2449608
  laurier - 08/14/11 12:44
 
  Q33- CC
the pt has likely staphylococcus aureus infection, and the most common site of carrying the bug is nares.
 
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* Re:NBME 12 block 4 answers
#2449612
  laurier - 08/14/11 12:46
 
  Q32- EE

nondipolarizing NMJ blocking drugs do not have cardiac muscle effect.
 
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* Re:NBME 12 block 4 answers
#2449613
  laurier - 08/14/11 12:47
 
  thank you longhorn for the link, but there are not all the answers.
I appreciate any volenteer to complete this block.
 
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