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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..
Cellular neuroscience is the study of neurons at a cellular level.
This includes morphology and physiological properties of single neurons.
In neuroscience, synaptic plasticity is the ability of synapses to strengthen or weaken over time, in response to increases or decreases in their activity.
Since memories are postulated to be represented by vastly interconnected networks of synapses in the brain, synaptic plasticity is one of the important neurochemical foundations of learning and memory (see Hebbian theory).
Neurons are diverse with respect to morphology and function.
If more of the same type of postsynaptic receptors are activated, then more Na will enter the postsynaptic membrane and depolarize cell.There are two families of receptors: ionotropic and metabotropic receptors.Ionotropic receptors are a combination of a receptor and an ion channel.An action potential can be divided into several sequential phases: threshold, rising phase, falling phase, undershoot phase, and recovery.Following several local graded depolarizations of the membrane potential, the threshold of excitation is reached, voltage-gated sodium channels are activated, which leads to an influx of Na ions.