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Cell signals control process of apoptosis. The cell signals are extracellular or intracellular. | Cell signals control process of apoptosis. The cell signals are extracellular or intracellular. | ||
Hormones, growth factors, nitric oxicers, and cytokines are extracellular signals, and they cross plasma membranes. Intercellular signals are cell stress, cell suicide, heat, radiation, nutrient deprivation, and viral infection. [http://en.wikipedia.org/wiki/Apoptosis] | Hormones, growth factors, nitric oxicers, and cytokines are extracellular signals, and they cross plasma membranes. Intercellular signals are cell stress, cell suicide, heat, radiation, nutrient deprivation, and viral infection. [http://en.wikipedia.org/wiki/Apoptosis] | ||
===Pathways=== | ===Pathways=== |
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