Which of these is incorrect? a. most extracellular signal molecules specifically bind to a single type of receptorb. for a given signaling molecule, every cell will have the receptor for that moleculec. different cell types may respond to the same signal molecule in different waysd. cell "relay" systems for signaling can cause more than a single cell responsee. cells may respond to multiple, different signals that converge and integrate with each other.

The answer is letter B.

Explanation:

For a given signaling molecule, every cell will have the receptor for that molecule. It is a false statement because a small number of extracelular signaling molecules can be amplified to produce a large cellular response and also provide opportunity for regulation and coordination.

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