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Cellular neuroscience is the study of neurons at a cellular level.

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As the rising phase reaches its peak, voltage-gated Na channels are inactivated whereas voltage-gated K channels are activated, resulting in a net outward movement of K ions, which repolarizes the membrane potential towards the resting membrane potential.

Repolarization of the membrane potential continues, resulting in an undershoot phase or absolute refractory period.

Some neurons such as photoreceptor cells, for example, do not have myelinated axons that conduct action potentials.

Other unipolar neurons found in invertebrates do not even have distinguishing processes such as dendrites.

Synaptic plasticity in both excitatory and inhibitory synapses has been found to be dependent upon postsynaptic calcium release Two molecular mechanisms for synaptic plasticity (researched by the Eric Kandel laboratories) involve the NMDA and AMPA glutamate receptors.

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