Now, there are many examples of ligand gated ion channels inside our body. And the one that we're going to take a look at in a future electri is the acetylcholine receptor that we basically find on the postsynaptic membranes of cells found within the neuron pathway. So let's suppose this is the presynaptic neuron cell and this is the postsynaptic cell and this is the membrane of the post synaptic cell. So along the membrane we have many of these Ligand gated on channels we call Acetylcholine receptors. And they're essentially closed. Now, because they're closed, the sodium ions, which are found at a higher concentration on the outside of the cell, cannot move into the cell.