Unit 4A Review

Front

What binds to a membrane protein and does not enter a cell?

Back

Protein hormone

Front

What are the three parts of a signal transduction pathway?

Back

Reception, transduction, response

Front

Which of the following is NOT involved in transduction?

Back

Ligands

Front

What is the impact of a mutation in the protein components of the transduction signaling pathway?

Back

Alters response of the cell

Front

Which substance easily passes through the membrane?

Back

Steroid hormone

Front

Define signal transduction.

Back

The process by which a cell responds to external signals through a series of molecular events.

Front

What role do secondary messengers play in signal transduction?

Back

They amplify the signal within the cell.

Front

What is a ligand?

Back

A molecule that binds to a receptor to initiate a signal transduction pathway.

Front

What is the function of a receptor in signal transduction?

Back

To detect and bind to specific ligands.

Front

What is phosphorylation cascade?

Back

A series of chemical reactions during signal transduction where enzymes add phosphate groups to proteins.