Remember! Drawing a diagram is not a test of artistic skills. It is just the ability to show essential features.

In the photograph, note both the colour and the appearance of the cytoplasm. The background colour of the cytoplasm is pinkish blue, but the striking feature is the blue particles. If you described the cytoplasm as being full of particles / clumps / or as being 'grainy' / granular... you got it!

With large neurons, the nucleus can be deceptive. In this photographs, two neurons have circles drawn inside them. Each circle represents a nucleus! Compare these two nuclei with other nuclei - four other nuclei are shown by blue arrows. And there are many more, most of them quite small compared to the nuclei of the neurons. In conclusion, the nucleus of the neuron Q is large.

Now take another careful look at the nucleus of the neuron. The overall appearance is pale, but there are clumps of blue material in it. Such a nucleus is called a euchromatic nucleus. It indicates a highly active cell. The prominent dot (yellow arrow) is the nucleolus.

The nucleus of the neuron is more-or-less in the centre of the cell.

Nucleolus, euchromatic nucleus are concepts from ANHB 1101, and are explained in Chapter 2 of the online Course Reader.

In comparison, cell 'S' seems to be simpler! We do not have a comparison to judge the size of the cell, but that does not matter.

Note that its cytoplasm is uniform in appearance and pink in colour.

The nucleus is fairly large, is pale in general, and does have an easily visible nucleolus.

Here again, the nucleus is centrally located in the cell.