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.
Why a Dollar is Called a âBuckâ. As with many etymologies, the exact root of this word is difficult to say with one hundred percent certainty. However, the leading theory is extremely plausible and backed up by a fair bit of documented evidence. Specifically, it is thought that a dollar is called a âbuckâ thanks to deer. One of the earliest references of this was in 1748, about 44 years before the first U.S. dollar was minted, where there is a reference to the exchange rate for a cask of whiskey traded to Native Americans being â5 bucksâ, referring to deerskins. At this time, a buck skin was a common medium of exchange.