AP Biology: Unit 4 Review (CED)

Front

What occurs when the ligand binds to the receptor?

Back

Confirmation change in shape of receptor.

Front

Which of the following is NOT involved with transduction?

Back

Ligands.

Front

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

Back

Negative Feedback.

Front

What are the three parts of a signal transduction pathway?

Back

Reception, transduction, response.

Front

Which of the following is NOT a stage of the cell cycle?

Back

Apoptosis.

Front

Define signal transduction.

Back

The process by which a cell responds to substances or signals from its environment.

Front

What is a ligand?

Back

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

Front

What role do secondary messengers play in signal transduction?

Back

They amplify the signal within the cell after the receptor is activated.

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 the function of phosphorylation in signal transduction?

Back

It modifies proteins to activate or deactivate them, thus propagating the signal.