Final answer:
Cells communicate through signaling molecules, triggering specific responses and influencing cellular functions.
Explanation:
Signals in cells play a crucial role in cellular communication by influencing cell behavior through signaling molecules like proteins. Cells have receptors that bind to specific signals, triggering responses such as gene transcription, cell division, or chemical reactions.
Signal transduction is the process where an extracellular signaling molecule activates a receptor, leading to a series of biochemical events inside the cell that eventually produce a response, altering various cellular functions or gene expression.
Cells can exhibit transient responses to signals or adapt to their presence through negative feedback mechanisms, resulting in different gene expressions and cellular behaviors.
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