AP Bio Insta-Review Topic 4.1: Cell Communication

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What is Direct Signaling?

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A type of cell communication where cells communicate through direct contact, such as a Helper T cell binding to an antigen-presenting cell.

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What is Paracrine Signaling?

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A form of signaling where a ligand binds to receptors on nearby cells, allowing for localized communication.

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Where are steroid hormone receptors located?

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Intracellular, meaning they are found inside the cell rather than on the cell membrane.

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What is Autocrine Signaling?

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A type of signaling where a cell releases a signal that binds to receptors on itself, affecting its own behavior.

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What is the role of a nearby cell in Paracrine Signaling?

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The nearby cell is the one that releases the signaling molecule to communicate with other nearby cells.

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What distinguishes Synaptic Signaling from other types of signaling?

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Synaptic signaling involves the release of neurotransmitters across a synapse to communicate between neurons.

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What is Long Distance Signaling?

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A type of signaling where hormones are released into the bloodstream to affect distant target cells.

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What is a ligand?

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A molecule that binds to a specific receptor to initiate a signaling pathway.

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What is the difference between Autocrine and Paracrine Signaling?

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Autocrine signaling involves a cell signaling to itself, while paracrine signaling involves signaling to nearby cells.

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What is the function of receptors in cell signaling?

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Receptors are proteins that bind to signaling molecules (ligands) and initiate a cellular response.