AP Biology Unit 4 review

Front

What type of feedback loop do mammals use to maintain a constant body temperature?

Back

Negative feedback loop.

Front

What is the role of cyclin in the cell cycle?

Back

Cyclin interacts with CdK to initiate the mitotic phase.

Front

What happens when a medicine blocks a secondary messenger in a cell signaling pathway?

Back

It inhibits transduction, thus deactivating the response.

Front

What is the result of mitosis?

Back

2 identical diploid cells.

Front

What is the consequence of defective protein phosphatases?

Back

Cancerous cells would take advantage and grow uncontrollably because the cell cycle cannot shut down.

Front

Define homeostasis.

Back

The process by which living organisms regulate their internal environment to maintain stable, constant conditions.

Front

What is the function of CdK in the cell cycle?

Back

Cyclin-dependent kinases (CdKs) are enzymes that, when activated by cyclins, help regulate the cell cycle.

Front

What is the difference between diploid and haploid cells?

Back

Diploid cells have two sets of chromosomes, while haploid cells have one set.

Front

What is the role of secondary messengers in cell signaling?

Back

Secondary messengers amplify the signal from a receptor and help propagate the signal within the cell.

Front

What is the significance of the mitotic phase in the cell cycle?

Back

The mitotic phase is when the cell divides, resulting in two daughter cells.