Cell Signaling

Front

What is cell signaling?

Back

Cell signaling is the process by which cells communicate with each other to coordinate their activities, often involving signaling molecules and receptors.

Front

What is a ligand in cell signaling?

Back

A ligand is a molecule that binds to a receptor to initiate a cellular response.

Front

What happens to TSH levels when thyroxine levels increase?

Back

The level of TSH (thyroid stimulating hormone) will decrease.

Front

How is a cellular response terminated?

Back

The ligand and receptor separate.

Front

What is cAMP and how is it formed?

Back

cAMP (cyclic adenosine monophosphate) is formed from ATP by a cyclization reaction that removes two phosphate groups.

Front

What role do second messengers play in cell signaling?

Back

Second messengers relay messages from the outside of the membrane throughout the cytoplasm.

Front

What is the function of protein kinases in cell signaling?

Back

Protein kinases activate proteins by transferring a phosphate group to them.

Front

What is a phosphorylation cascade?

Back

A phosphorylation cascade is a series of events where one protein kinase activates another, amplifying the signal.

Front

Why are phosphorylation cascades important?

Back

They increase amplification of the response, allowing for a stronger cellular reaction.

Front

What is the role of receptors in cell signaling?

Back

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