The visual pathway to the occipital lobe of the brain consists most simply of a chain of five neurons. Trace the pathway by organizing the following structures as 1, 2, 3, 4, 5:
1. Photoreceptor cells
2. Bipolar neurons
3. Ganglion cells
4. Neurons forming lateral geniculate nucleus of the thalamus
5. Cortical neurons in the occipital (visual) cortex