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Home Q & A Board Biology-Related Homework Help Cell Biology
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dkpierce dkpierce
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11 years ago
I NEED HELP PLEASE I CANT FIND THE ANSWERS TO THESE LAST 3 QUESTIONS!!

If depolarizing membrane potentials open voltage-gated sodium channels, what closes them?

Why must a sushi chef go through years of training to prepare puffer fish for human consumption?

For action potential generation and propagation, are there any other cation channels that could substitute for the voltage-gated sodium channels if the sodium channels were blocked?
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#1
Staff Member
11 years ago
Quote from: dkpierce (11 years ago)
Why must a sushi chef go through years of training to prepare puffer fish for human consumption?

Careful preparation of the pufferfish requires removal of the toxic portions that contain tetrodotoxin.
The poison is most concentrated in the liver, ovaries and skin of the fish.

Quote from: dkpierce (11 years ago)
For action potential generation and propagation, are there any other cation channels that could substitute for the voltage-gated sodium channels if the sodium channels were blocked

Calcium channels could possibly substitute for sodium channels to provide an influx of cation.
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