5. Cell signaling is of the paracrine type when
(A) Immune cells secrete proteins which stimulates themselves to be activated.
(B) endocrine cells secrete hormones
(C) signaling cells secrete a regulator acting on a distant cell
(D) signaling cells secrete a regulator acting on a nearby cell
(E) none of above

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統計: A(0), B(0), C(0), D(1), E(0) #3387175

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