What is the resting potential? What are the charges inside and outside of the neuron? Which...

What is the resting potential? What are the charges inside and outside of the neuron? Which ions are found in and outside of the neuron? When the neuron is at a resting potential, is it polarized, depolarized, repolarized

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Expert Solution

1.Resting membrane potential is potential in membrane at rest where no transmition takes place

Here RMP is -70 mv ..

I gave the name of each phase and cause of each ie ionic basis of each ..

To transmit signal membrane should be depolarize.

Hence to depolarize Na+ channels opens ...

Make inside cell fill with more positive charge .. to nullify the negative charge ...and potential goes towards zero .

As soon as potential reaches to -55mv which is thresothr for action potential ...

It shoots .. more Na+ channel opens .. rapid shoot ( phase1) occurs ...

.as soon as it near to zero / more than zero ... The Na+ channel closes and potassium channel opens ... It's happen due to voltage gated channel( at specific voltage channels opens / closes)

Now potassium channel opens and k+ is rapidly move out of cell membrane and potential drops ...rr repolarization ( phase2)

But due to delayed in closure of k+ channel more negative become potential this phase3 (hyperpolarizatio).

After phase 3 ... The Na+ k+ pump active and make balance between ion and again membrane potential become as resting membrane potential..(-70mv)

Ready to receive another stimulus..

Sydney Mullin answered 1 year ago

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