Put the following events comprising neurotransmission in a correct chronological order. Simply put the letters in a correct order; you do not need to explain why the order is correct.

1. The signal is transmitted along the cell body and axon.
2. Receptors on the dendrites open and allow ions to flow into the neuron.
3. Neurotransmitters land on receptors embedded in the surfaces of dendrites.
4. The signal reaches the axon terminal and triggers the release of neurotransmitters into the synaptic cleft.
5. If enough ions flow into the neuron, then the neuron becomes "triggered" and initiates its own signal.