AP Biology: Unit 4 Review (CED)

Front

What are the three parts of a signal transduction pathway?

Back

Reception, Transduction, Response

Front

What feedback mechanism involves homeostasis of a particular condition by regulating physiological processes?

Back

Negative Feedback

Front

Which component is NOT involved in the transduction step of a signal transduction pathway?

Back

Ligands

Front

What are the responses by the cell from a signal transduction pathway?

Back

Cell growth, gene expression, secretion of molecules.

Front

What occurs when the ligand binds to the receptor?

Back

Confirmation change in shape of receptor.

Front

Define signal transduction.

Back

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

Front

What is a ligand?

Back

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

Front

What is the role of secondary messengers in signal transduction?

Back

They amplify the signal and help propagate the response within the cell.

Front

What is the difference between positive and negative feedback mechanisms?

Back

Positive feedback amplifies a response, while negative feedback reduces it to maintain homeostasis.

Front

What is a phosphorylation cascade?

Back

A series of events where one protein kinase activates another, leading to a cellular response.