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biological

Judged: two independent readers; copy check clear.

paracrine

paracrine Paracrine refers to a local signaling effect in which a substance released by one cell acts on nearby cells.

Paracrine refers to a local signaling effect in which a substance released by one cell acts on nearby cells. In the packet, histamine released by gastric neuroendocrine cells stimulates neighboring parietal cells to release hydrochloric acid.