â¢ When the axon hillock is depolarized to threshold, an action potential is generated. Voltage-gated. channels open, thereby increasing permeability of the neuron first to sodium and then to. potassium. â¢ As sodium moves rapidly into the neuron, it produces the rising phase of the action potential. â¢ As the inward movement of sodium slows and the outward movement of potassium increases, the. membrane repolarizes.
Why is 25 pound called a pony in cockney slang. Pony, in British (especially London) slang, is the term for a sum of Â£25.Possibly derived from Indian Ruppee featuring animals on their currency.hy is 25 pound called a pony in cockney slang. Pony, in British (especially London) slang, is the term for a sum of Â£25.
According to businessballs.com the expression pony is explained in the following manner: pony-twenty-five pounds (Â£25). From the late 18th century according to most sources, London slang, but the precise origin is not known.ell first let me begin by helping understand the classification of a pony. A pony is a horse that is under 14.2 hands. A hand is a unit of measurement used to measure equestr â¦ ian species and is exactly 4 inches.