Answer:1. What promotes cell growth?
A growth factor is a naturally occurring substance capable of stimulating cell proliferation, wound healing, and occasionally cellular differentiation. Usually it is a secreted protein or a steroid hormone. ... Examples are cytokines and hormones that bind to specific receptors on the surface of their target cells.
2. what helps cells grow? For a typical dividing mammalian cell, growth occurs in the G1 phase of the cell cycle and is tightly coordinated with S-phase (DNA synthesis) and M phase (mitosis). The combined influence of growth factors, hormones, and nutrient availability provides the external cues for cells to grow.
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