AP - Unit 2: Cell Communication

Front

What is long-distance signaling in cell communication?

Back

Long-distance signaling refers to the process by which cells communicate over long distances, often through hormones or other signaling molecules that travel through the bloodstream or other bodily fluids.

Front

What is a positive feedback loop in biological systems?

Back

A positive feedback loop is a process in which the output of a system enhances or amplifies the initial stimulus, leading to an increase in the response.

Front

What is autocrine signaling?

Back

Autocrine signaling is a form of cell communication where a cell secretes a signaling molecule that binds to receptors on its own surface, affecting its own activity.

Front

What are gated ion channels?

Back

Gated ion channels are membrane proteins that open or close in response to specific stimuli, allowing ions to flow across the membrane and play a crucial role in cell signaling.

Front

What role do protein kinases play in cell signaling?

Back

Protein kinases are enzymes that modify other proteins by adding phosphate groups, which can activate or deactivate the target proteins, thus regulating various cellular processes.

Front

What is the function of a phosphate group in cellular signaling?

Back

A phosphate group is a chemical group that can be added to proteins by kinases, altering their function and activity, which is essential for signal transduction.

Front

What is the difference between paracrine and autocrine signaling?

Back

Paracrine signaling involves the release of signaling molecules that affect nearby cells, while autocrine signaling affects the same cell that releases the signaling molecules.

Front

What is the significance of signal transduction pathways?

Back

Signal transduction pathways are crucial for cells to respond to external signals, allowing them to adapt and react to changes in their environment.

Front

How do receptors function in cell communication?

Back

Receptors are proteins on the cell surface or inside the cell that bind to specific signaling molecules, initiating a response within the cell.

Front

What is the role of second messengers in cell signaling?

Back

Second messengers are small molecules that relay signals received by receptors on the cell surface to target molecules inside the cell, amplifying the signal.