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Na/K Pump in cold conditions

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Na/K Pump in cold conditions

Postby toshiba8899 » Thu Jan 29, 2009 5:26 am

On the plasma membrane, there are Na and K diffuse passively according to their gradients.

Then there is the active Na/K pump that pumps against the respective gradients.

My question is, what would happen if body temp decreases very quickly?

I think that since the Na/K pump is tempreature dependent (Q10=2), that in cold conditions it would stop working. If that stopped working, only the passive diffusion would be at work and since it is temperature independent (Q10=1), the gradients inside and outside the cell will equalize.

Also, since the NA/K pump sets up gradients to transport other molecules like glucose against its gradient, there would be other implications as well.

Is this right?
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Re: Na/K Pump in cold conditions

Postby toshiba8899 » Thu Jan 29, 2009 7:31 pm

I was told I am on the right track, but it's still not a complete answer.

Anybody have any idea?
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Postby mith » Thu Jan 29, 2009 8:46 pm

It would stop working only if the temperature drops low enough. I'm pretty sure you'd see some different answers depending on what thermal value you're talking about.
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