Neuronal Potassium Channels
Potassium (K+) channels are proteins which span the membrane of cells and are selectively permeable to K+ ions.
Potassium (K+) channels are proteins which span the membrane of cells and which, when open, allow the selective flow of K+ ions from one side of the membrane to the other (usually from the inside of the cell to the outside). They can be gated by a variety of stimuli including voltage, changes in intracellular Ca2+ and certain other physiological mediators. In neurons, they have a number of functional roles related, primarily, to the electrical properties of the membrane. As such, they determine the neuronal action potential frequency, shape the neuronal action potential waveform ( Action potential) and control the strength of synaptic contacts between neurons [see 1]. Additionally, certain K+ channels regulate the absolute excitability of neurons and set (or contribute to) the neuronal resting membrane potential  ( Membrane Potential – Basics)....