santaclara
Forum Elite
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repolarization and hyperpolarization is same thing?
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| Ahab
Forum Elite
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repolarisation, returning to resting membrane potential after action potential.
Hyperpolarisation forcing the membrane potential below that of the resting membrane potential, may occur in the absence of action potentials, particularly with pharmacotherapy.
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| santaclara
Forum Elite
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but mostly in phsiology we use word repolarization rather then hyperpolarization.
am i right?
thanx for reply.
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| mani
Forum Guru
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both words are separate terms and used where appropriate. for example in ever action potential there is repolarization after depolarization. In rod cell of eye, there is HYPERPOLARIZATION in response to light falling on it
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| hiwa
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The cell is usually polarized-resting membrane potential- y?
because inside the cell is say -80 inside and zero is outside
we have the following course of events
1- de-polarization, means that u remove this polarity(-80/zero polarity) which happens because + ions going inside, simple
this occur because if u touch a nerve cell the permeability increase, for ions to go from outside to inside eg Na
2- Repolarization, what happened in depolarization will go back to its normal condition (-80/zero)
3- Hyperpolarization means that the polarity that u have (-80/zero) even become more polar by becoming say (-110/zero)
-80/zero is just example different cells might have different polarity
If u want to know Y the cell is (eg -80/zero polar ) u have to underestand nernst equation.
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