AP_ Unit 4_ Cell Comm & Mitosis_ CELL COMMUNICATION

Front

What is signal amplification in cell communication?

Back

Signal amplification is the process by which a small number of signaling molecules can produce a large response in the target cell, often achieved through a phosphorylation cascade.

Front

What is a secondary messenger?

Back

A secondary messenger is a molecule that relays signals received at receptors on the cell surface to target molecules inside the cell, an example being cyclic AMP (cAMP).

Front

How does paracrine signaling differ from hormone signaling?

Back

Paracrine signaling involves the release of signals into the extracellular fluid for short-distance communication, while hormone signaling involves the release of hormones into the bloodstream for long-distance communication.

Front

Can more than one ligand bind to the same receptor?

Back

True, more than one ligand can bind to the same receptor, allowing for diverse signaling responses.

Front

What is the role of a protein kinase?

Back

A protein kinase is an enzyme that transfers phosphate groups from ATP to specific proteins, thereby modifying their function and activity.

Front

What is a phosphorylation cascade?

Back

A phosphorylation cascade is a series of chemical reactions during cell signaling, where one enzyme phosphorylates another, leading to a chain reaction that amplifies the signal.

Front

What is the function of cAMP in cell signaling?

Back

cAMP acts as a secondary messenger that transmits signals from cell surface receptors to target proteins inside the cell, often leading to a cellular response.

Front

What is the difference between autocrine and paracrine signaling?

Back

Autocrine signaling occurs when a cell targets itself with signaling molecules, while paracrine signaling involves signaling to nearby cells.

Front

What is the significance of receptor specificity in cell communication?

Back

Receptor specificity ensures that only certain signals can bind to specific receptors, allowing for precise control of cellular responses.

Front

What is the role of ligands in cell signaling?

Back

Ligands are signaling molecules that bind to receptors on target cells, initiating a response and facilitating communication between cells.