AP Bio Cell Signaling

Front

What is a ligand?

Back

A ligand is a signal molecule that binds to a receptor protein, initiating a cellular response.

Front

What type of signaling involves a ligand affecting the same cell that produces it?

Back

Autocrine signaling.

Front

What is paracrine signaling?

Back

Paracrine signaling is a form of cell signaling where a cell produces a signal to induce changes in nearby cells.

Front

What type of receptor is a G-protein coupled receptor?

Back

A G-protein coupled receptor is a transmembrane receptor that activates a G-protein upon ligand binding, triggering a signaling cascade.

Front

What is the role of second messengers in cell signaling?

Back

Second messengers are molecules that relay signals received at receptors on the cell surface to target molecules inside the cell.

Front

Define endocrine signaling.

Back

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

Front

What is juxtacrine signaling?

Back

Juxtacrine signaling is a type of cell signaling that requires direct contact between the signaling and target cells.

Front

What is the function of receptor proteins?

Back

Receptor proteins bind to specific ligands and initiate a cellular response.

Front

What is the difference between a ligand and a receptor?

Back

A ligand is a signaling molecule, while a receptor is a protein that binds to the ligand to initiate a response.

Front

What is the significance of protein kinases in cell signaling?

Back

Protein kinases are enzymes that modify other proteins by adding phosphate groups, playing a crucial role in signaling pathways.