AP Bio Unit 4 MC - CollegeBoard

Front

What is an antigen?

Back

An antigen is a substance that induces an immune response in a host organism, often recognized by antibodies.

Front

What is the role of antibodies in the immune response?

Back

Antibodies are proteins produced by the immune system that specifically target and bind to antigens to neutralize or eliminate them.

Front

What is the function of antigen-presenting cells?

Back

Antigen-presenting cells (APCs) engulf antigens and present them on their surface to activate T cells, initiating an immune response.

Front

What are plasmodesmata?

Back

Plasmodesmata are narrow channels that connect adjacent plant cells, allowing for the movement of molecules and communication between cells.

Front

What is the G2 phase of the cell cycle?

Back

The G2 phase is the stage in the cell cycle where the cell prepares for mitosis, including the synthesis of proteins and organelles.

Front

What occurs during the S phase of the cell cycle?

Back

During the S phase, DNA replication occurs, resulting in the synthesis of sufficient DNA for two daughter cells.

Front

What is the role of insulin in blood glucose regulation?

Back

Insulin is a hormone that lowers blood glucose levels by facilitating the uptake of glucose into cells.

Front

What is the role of glucagon in blood glucose regulation?

Back

Glucagon is a hormone that raises blood glucose levels by promoting the release of glucose from the liver.

Front

How does a hydrophilic hormone reach its target cells?

Back

A hydrophilic hormone is released into the bloodstream, where it can travel to and bind to target cells with the appropriate receptors.

Front

What is cell-to-cell communication?

Back

Cell-to-cell communication refers to the process by which cells send and receive signals to coordinate their functions and responses.