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AP®︎/College Biology

Lesson 1: Cell communication

Cell communication

AP.BIO: IST‑3 (EU), IST‑3.A (LO), IST‑3.A.1 (EK), IST‑3.B (LO), IST‑3.B.1 (EK)

Image credit: Adapted from CNX OpenStax [CC BY 4.0], via Wikimedia Commons

Which of the following best describes the cell communication occurring in the figure above?

(Choice A)
A signal-emitting cell communicates with a nearby cell by releasing local regulators.
(Choice B)
A signal-emitting cell communicates with a far-away cell by releasing local regulators.
(Choice C)
A signal-emitting cell communicates with a far-away cell by releasing long-distance signaling molecules.
(Choice D)
A signal-emitting cell communicates with a nearby cell through direct cell-to-cell contact.

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