In modern communication we generally have various schemes to communicate the given signal, one of them is to convey information with different levels. does cell signaling too have levels apart from binary 'Yes' and 'No'.
For instance if a cell 'A' wants to communicate with another cell 'B'. I know it can do that by varying the concentration of molecules in the given media and 'B' will decide in favor of 'Yes' or 'No' based on the concentration sensed. But my question is does this sensing always happens in binary levels or is there some thing like:
- If nothing sensed do operation 'a'
- If moderate concentration sensed do operation 'b'
- If high concentration sensed do operation 'c'
I mean communication not done in binary levels but may be quaternary levels. If yes can any reference be provided?