AP Biology Unit 4 Review

Front

What type of feedback is represented when ADH is released during dehydration, causing more water to be absorbed into the bloodstream?

Back

Negative feedback

Front

In which phase of the cell cycle does the cell spend the greatest amount of time?

Back

Interphase

Front

How is a signal transduced to its target location in the cell?

Back

Enzymes are passing phosphate groups down a series of proteins.

Front

What phase occurs after metaphase in mitosis?

Back

Anaphase

Front

Why do mutations in receptor proteins affect cell signaling?

Back

All of the above: The receptor needs the proper sequence of amino acids, a specific shape to bind to its ligand, and the right polarity to interact with its ligand.

Front

What is the role of ADH in the human body?

Back

ADH (Antidiuretic Hormone) regulates water balance by promoting water reabsorption in the kidneys.

Front

Define interphase in the context of the cell cycle.

Back

Interphase is the phase where the cell spends most of its time, preparing for division by growing and replicating its DNA.

Front

What is the significance of signal transduction in cellular communication?

Back

Signal transduction allows cells to respond to external signals and communicate with each other, leading to appropriate cellular responses.

Front

What happens during anaphase in mitosis?

Back

During anaphase, sister chromatids are pulled apart to opposite poles of the cell.

Front

What is a ligand in cell signaling?

Back

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