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Which stage of cell communication involves the detection of a signal molecule?

Reception

The stage of cell communication that involves the detection of a signal molecule is reception. During this phase, a cell interacts with specific signaling molecules (ligands) that bind to receptors on the cell's surface or within the cell. This binding initiates a series of events that lead to a cellular response. The receptors are highly selective and capable of recognizing specific signal molecules among many others. When a signaling molecule binds to a receptor, it triggers a conformational change in the receptor, which activates the cell's response pathway. This is the first critical step in cell communication, as it sets the stage for subsequent processes like transduction and response. In contrast, transduction refers to the process by which the signal is converted into a form that can bring about a cellular response, often involving a series of biochemical events. Response refers to the final outcome that occurs in the cell as a result of the initial detection of the signal, such as changes in gene expression or cellular activity. Amplification, while related to signal transduction, focuses on increasing the strength of the signal as it is processed through various steps, often leading to a significant effect from a relatively small initial signal.

Transduction

Response

Amplification

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