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7) Which of the following signaling mechanisms represent a correctly matched pair? (A) endocrine- neural communication (B) synaptic- intravenous communication (C) paracrine-communication with nearby, surrounding cells (D) gap junction-communication via hormones (E) receptor- substrate communication
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Answer: C) Paracrine signalling- communication with nearby surrounding cell

Note:

Gap junctions: direct contact: cell / cell recognition,
Paracrine signalling: local only, example: growth factors
Synaptic signalling: neurons only, neurotransmitters
Endocrine signalling: long distances, example: hormones

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