Abstract Background The balance between self-renewal and differentiation of stem cells is expected to be tightly controlled in order to maintain tissue homeostasis throughout life. also in the face of environmental hazards. Theory. predicting that homeostasis is maintained by a negative feedback on stem cell proliferation. https://www.jmannino.com/flash-price-Left-Brake-Lever-for-the-Realtree-RT100-Mini-Bike-save-big/