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NBME p2ck_form8 Answers

step2ck_form8/Block 3/Question#1 (reveal difficulty score)
A 52-year-old woman comes to the physician ...
Decreased lactase activity in the brush border ๐Ÿ” / ๐Ÿ“บ / ๐ŸŒณ
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 +1 
submitted by โˆ—step_prep(116),
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 +0 
submitted by โˆ—azibird(256),

Was anyone else torn because you thought the colonic hydrogen travelled backwards up the entire gut to be exhaled via mouth fart? So that the small-bowel must have decreased pH?

Maybe just me...

Well apparently that's not how the test works. Or the human body. "The hydrogen produced by the bacteria is absorbed through the wall of the small or large intestine or both. The hydrogen-containing blood travels to the lungs where the hydrogen is released and exhaled in the breath where it can be measured." https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3155069/




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