Relative stimulatory efficiency of various points on the surface of hemopoietic source cells

We make quantitative estimates for the relative stimulatory efficiency at various points on the membrane of a hemopoietic source. This cell produces a stimulus, P, which supports renewal of parasitic stem cells (SCs) in physical contact with the source's surface. We find that the tips of long pseudopods extending from the source's main body should have the highest stimulatory efficiency.