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Repolarization of the membrane potential continues, resulting in an undershoot phase or absolute refractory period.
The undershoot phase occurs because unlike voltage-gated sodium channels, voltage-gated potassium channels inactivate much more slowly.
Nevertheless, as more voltage-gated K channels become inactivated, the membrane potential recovers to its normal resting steady state..
In neuroscience, synaptic plasticity is the ability of synapses to strengthen or weaken over time, in response to increases or decreases in their activity.Thus, the fundamental difference between a neuron and a nonneuronal cell is a matter of degree.The Hodgkin–Huxley model of an action potential in the squid giant axon has been the basis for much of the current understanding of the ionic bases of action potentials.Ionotropic receptors are a combination of a receptor and an ion channel.When ionotropic receptors are activated, certain ion species such as Na to enter the postsynaptic neuron, which depolarizes the postsynaptic membrane.
: Coming from Cape Town / George / Knysna direction on the N2, turn right on Piesang Valley Road, just before entering the big roundabout after the overhead pedestrian crossing.