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valkas [14]
3 years ago
11

HELP DUE IN 5 MIN

Biology
1 answer:
Volgvan3 years ago
3 0

Answer:

Fuel cell electric vehicles are powered by hydrogen

they only emit water vapor and warm air

Explanation:

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Under which circumstances do plants take up water by osmosis?​
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Under which circumstances do plants take up water by osmosis?

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Tetraethylammonium (TEA) is a potent neurotoxin that results in death from respiratoryfailure within 10 to 30 minutes. When a ne
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Answer: B voltage-gated potassium channels

Explanation:#

Tetraethylammonium is a pH- potassium channel  blocker.

Therefore, it prevents the escape  of potassium ions from the axoplasm, which makes it ( axoplam) positive from the rise in potassium ions concentration , since potassium ion is positive charged and intracellular ion . This initiate repolarization which returns to membrane state potential.

Since it is pH -potassium ion blocker; it does not affect the voltage-gated sodium ion channels, so action potential can occur. But after the sodium gated channels were closed,action potential drops but the concentration of potassium rises because  :

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