Answer: Main functions of the molecular mechanisms of cell communication within target cells is TRANSMISSION of the signal.
Explanation: Cell signaling can take place through direct cell-cell contact or through the action of secreted signaling molecules.
When cells need to communicate over long distance than can be facilitated by cell-cell contact or membrane interaction only, extracellular products come to play and act as signals over longer distances. These signaling products are produced and released by signaling cells, then moved to other cells where they induce specific responses in target cells that have the receptors to the signals produced.
Three stages are involved;
1. Reception
2. Transduction
3. Response