The following HTML text is provided to enhance online
readability. Many aspects of typography translate only awkwardly to HTML.
Please use the page image
as the authoritative form to ensure accuracy.
Biologic Markers in Urinary Toxicology
Figure 6-1 The cell cycle.
be targets for future biologic-marker research. The control of growth and differentiation involves sophisticated modes of cellular communication. Figure 6-2 illustrates actual and potential modes of growth control, as might be found in the prostate. Endocrine control is exemplified by the effects of androgen, which stimulates the production of growth factors in both epithelial and stromal cells. Fibroblasts secrete factors that bind to epithelial-cell receptors.
