A) is pluripotent. B) divides approximately once a week. C) gives rise to all four major epithelial cell types in the right proportions. D) expresses Lgr5, just like the epithelial cells that derive from it. E) All of the above.
A) always divide asymmetrically to give rise to two different daughter cells. B) are terminally differentiated. C) can divide for the entire lifetime of the organism. D) divide at a relatively fast rate. E) All of the above.
If some cells in an adult mammal are lost, they are lost forever and cannot be replaced. Which of the following cell types have such a limitation? Your answer would be a string composed of a subset of the letters A to E in alphabetical order, e.g. AE. (A) Photoreceptive epithelium of the retina (B) ? Cells of pancreatic islets (C) Hepatocytes of the liver (D) Auditory epithelium of the inner ear (E) Olfactory epithelium of the nose