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IgorLugansk [536]
2 years ago
6

What is the purpose of RNA?

Biology
1 answer:
Ostrovityanka [42]2 years ago
6 0

Answer:

to act as a messenger from DNA to the rest of the cell.

Explanation:

I feel like this one was pretty self explanatory lmfa.o

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When the neurons get excited, the sodium ions start to enter by sodium channels.  

Now there are more positive ions inside the cell membrane. It disturbs the resting potential i.e. -70mV. This stage is known as depolarization.

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But the initial stability of the cell membrane has to be maintained. To restore the resting stage, the sodium ions start to move out of the membrane and potassium ions enter into the cells again. This is an active transport and has done by the Na+ - K+ pump. Here 3 sodium ions move out and 2  potassium ions pumped into the cell through the plasma membrane.  

Thus the resting potential regains. The potassium ions come back into the cells against the concentration gradient and ATP provides the energy for this phenomena.

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Which of the following is NOT a characteristic of the cell membrane?
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