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When an action potential reaches a presynaptic cell, it causes voltage-gated ion channels in the membrane to open, which allows Ca2+ to enter the cell. This Ca2+ diffuses into the cell from high to low co...

t = (v - u) / a

f^-1(x)=(e^x-1)/3 g(x)=3/(3x+1)

River cliffs are features of meanders. In a meander the outside bank is where the Thalweg flows(fastest flowing part of the river), this means the velocity is greatest here so there is more available ener...

The conditional perfect, also called the past conditional (conditionnel passé), is used to express what would have happened. To form the conditional perfect, use the con...