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Prep4USMLE Forum » USMLE Step 1 Forum » Physiology Forum

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nadiabarati

06/26/06 - 07:44 AM

If the extracellular K+ concentration is increased from 4 meq/L to 10 meq/L,
a. The membrane potential will become more negative
b. The sodium conductance will increase
c. The potassium conductance will increase
d. The membrane will become more excitable
e. The Na-K pump will become inactivated

Ivil
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06/26/06 - 08:33 AM

D. Increased extracellular K+ will reduce the K+ efflux leading to more positive membrane potential.

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nadiabarati

06/26/06 - 08:58 AM

robin082006
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06/26/06 - 08:58 AM

D

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reet
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06/26/06 - 09:00 AM

D

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nadiabarati

06/26/06 - 12:16 PM

WHY?!!

leen
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06/26/06 - 12:18 PM

on inc the k conc there is inc in = charge outside n it also dec K efflux thus making membrane more exicatble

hope it helps

Diego Casali
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06/26/06 - 12:46 PM

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