To effectively relay signals, cell-to-cell communication utilizes a chemical messenger system to:
A) Displace surface receptor proteins
B) Accumulate within cell gap junctions
C) Bind to contractile microfilaments
D) Release secretions into extracellular fluid
Ans: D
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Signals are transmitted by releasing chemical secretions into extracellular fluid. Chemical signals move through cell-to-cell junctions to reach other cells and may attach to surface receptor proteins. The cytoplasmic contractile microfilaments are incapable of transmitting communication signals.
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