Where two different cell types abut, it is easy to see the cell border. Identify a goblet cell and a ciliated cell, and satisfy yourself that this is the case. Note also the cilia, another surface specialization. The double-layered nuclear membrane cannot be seen in the LM either. Since the staining of the nucleus and cytoplasm in this cell are so different, however, one can identify the border of the nucleus.
Neurons typically have a large, pale-staining euchromatic nucleus.
Neurons are busy cells and need their DNA in the uncoiled state for active transcription to occur. In the active state the DNA doesn't stain, probably because of a difference in the exposure of their phosphate groups to the stain. Inactive DNA stains intensely. This form is referred to as heterochromatin . Identify the Schwann cell nuclei.