AP Bio Insta-Review Topic 4.1: Cell Communication

Front

What are secondary messengers in cell communication?

Back

Secondary messengers are molecules that relay signals received at receptors on the cell surface to target molecules inside the cell, amplifying the strength of the signal. Examples include cAMP and Ca2+.

Front

Do different cells respond to the same signal in the same way?

Back

False. Different cells can respond differently to the same signal based on their specific receptors and intracellular signaling pathways.

Front

Does the ligand travel through the signal transduction pathway?

Back

False. The ligand binds to a receptor, initiating the signal transduction pathway, but it does not travel through it.

Front

Are ligands specific to the type of cell they bind to?

Back

True. Ligands are specific molecules that bind to particular receptors on target cells, leading to a specific response.

Front

What is an example of a secondary messenger?

Back

Ca2+ is an example of a secondary messenger that plays a crucial role in various signaling pathways.

Front

What role do receptors play in cell communication?

Back

Receptors are proteins on the cell surface or inside the cell that bind to specific ligands, initiating a cellular response.

Front

What is signal transduction?

Back

Signal transduction is the process by which a cell responds to external signals through a series of molecular events, leading to a specific response.

Front

What is the function of cAMP in cell signaling?

Back

cAMP (cyclic adenosine monophosphate) acts as a secondary messenger that transmits signals from receptors to target proteins inside the cell.

Front

What is the difference between a ligand and a secondary messenger?

Back

A ligand is a signaling molecule that binds to a receptor, while a secondary messenger is a molecule that relays and amplifies the signal inside the cell.

Front

Can a single ligand activate multiple signaling pathways?

Back

Yes, a single ligand can activate multiple signaling pathways depending on the type of receptor and the cell's internal machinery.