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How single-celled organisms use signals to communicate. Yeast mating types, bacterial quorum sensing, and biofilms.

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In this article, we'll examine the basic principles of how cells communicate with one another. We'll first look at how cell-cell signaling works, then consider different kinds of short- and long-range signaling …

Explore cell communication and the cell cycle in AP Biology with videos, articles, and practice questions on Khan Academy.

Learn about the basics of cell signaling, including its categories and mechanisms, in this comprehensive overview for biology enthusiasts.

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This process starts when molecules outside the cell interact with cell receptors, setting off a chain of events. G-proteins, acting like molecular switches, play a key role here.

Learn how signals are relayed inside a cell starting from the cell membrane receptor. The chains of molecules that relay intracellular signals are known as intracellular signal transduction pathways.

Despite these differences, signaling pathways share a common goal: to produce some kind of cellular response. That is, a signal is released by the sending cell in order to make the receiving cell change …