Question

1. The apical ends of the epithelial cells stain a bit differently from the bulk of the cytoplasm of these cells. This difference in staining is probably a consequence of nature of hte cell in the apical region. Even though one cannot resolve them at the light microscope level, what structural elements (fine projections of the plasma membrane) are foind along the apical suffaces of these cells? What name is given to the aggregation of these structural elements along the apical surface of the epithelium?

2. How can one be confident that a tissue is some sort of epithelium?

3. If you are looking at the simple squamous epithelium and viewing the apical surface of the epithelium, based on this, why can you not conclude anything other than "this is an epithelium of some sort"? (keep in mind the two things you need to know to define and epithelium in a conventional way) ( what are the two conventional ways to define this?)

Answer 1