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.
Issued as 25p coins. 3. Issued as Â£5 coins. At the time of decimalisation the United Kingdom five-shilling crown was redenominated as a 25p coin and pieces struck prior to 1990 â all the way back to 1818 â continue to be legal tender for that amount.The face value of new issues of the coin from 1990 was increased to Â£5.t the time of decimalisation the United Kingdom five-shilling crown was redenominated as a 25p coin and pieces struck prior to 1990 â all the way back to 1818 â continue to be legal tender for that amount.