Question

What is the relation between hyperpolarisation and the refractory period in the action potential in neurons?

Answer 1

....what does that even say? o_O I think my brain is crying.

Answer 2

One more time, but in English,

Answer 3

See attachment.
When the neuron reaches its threshold the voltage gatedNa+ ion channels open (or the conductivity is sufficiently high) so that Na+ ions can move inside the cell and the cell become more positive. This works as a positive feedback. Now when the cell have become depolarized (positive), the K+ ion channels open allowing K+ to be transported out in so we get back to our resting potential. But this is not the case, becuase K+ leave the cell in a such an amount, the membranepotential become more negative than the resting potential, it have become hyperpolarized. Also during the hyperpolarization the Na+/K+-ATPase is pumping the original distribution of ions inside the cell. But when the cell have become fully hyperpolarized, we enter the refractory period. In the refractory period, the Na+ channels and K+ channels will be closed leaving only Na+/K+-ATPase to work and make sure that we get the original distribution of ions and therefore getting the resting membranepotential.

Answer 4

Thank you so much!!

Answer 5

No problem.