AP Bio: Unit 4 (CED)

Front

What is the cell cycle?

Back

The cell cycle is the series of phases that a cell goes through to divide and replicate. It includes interphase (G1, S, G2) and the mitotic phase (M).

Front

What does DNA replication involve?

Back

DNA replication involves the process of copying the DNA molecule to produce two identical DNA strands, ensuring that each daughter cell receives a complete set of genetic information.

Front

What are Gap Junctions?

Back

Gap Junctions are specialized intercellular connections that allow direct communication between animal cells by permitting the passage of ions and small molecules.

Front

What is a Negative Feedback Loop?

Back

A Negative Feedback Loop is a regulatory mechanism in which a change in a physiological variable triggers a response that counteracts the initial change, helping to maintain homeostasis.

Front

What is Juxtacrine signaling?

Back

Juxtacrine signaling is a type of cell communication that occurs when cells are in direct contact with each other, allowing for the transfer of signals through gap junctions or other direct connections.

Front

What is a Phosphorylation Cascade?

Back

A Phosphorylation Cascade is a series of chemical reactions in a cell where one enzyme phosphorylates another, leading to a chain reaction that amplifies the signal and results in a cellular response.

Front

What is the role of Insulin in blood sugar regulation?

Back

Insulin is a hormone produced by the pancreas that helps lower blood sugar levels by facilitating the uptake of glucose into cells.

Front

What is the difference between endocrine and paracrine signaling?

Back

Endocrine signaling involves hormones traveling long distances through the bloodstream to target cells, while paracrine signaling involves signals affecting nearby cells.

Front

What is the significance of cell signaling in multicellular organisms?

Back

Cell signaling is crucial for coordinating cellular activities, allowing cells to communicate and respond to changes in their environment, which is essential for maintaining homeostasis.

Front

What is the function of Plasmodesmata in plant cells?

Back

Plasmodesmata are channels between plant cells that allow for the transport of water, nutrients, and signaling molecules, facilitating communication and coordination.