AP Bio: Unit 4 (CED)

Front

What is juxtacrine signaling?

Back

A type of cell signaling that occurs when cells are in direct contact with each other.

Front

What is the first stage of signal transduction?

Back

Reception: The stage where a signaling molecule binds to a receptor on the target cell.

Front

What role do second messengers play in cell signaling?

Back

They relay messages from the outside of the membrane throughout the cytoplasm.

Front

What is negative feedback in homeostasis?

Back

A process that reduces the output of a system to bring it back to its set point.

Front

What happens if a cell cannot perform apoptosis?

Back

It can lead to the continued growth of cancerous cells and proliferation of infected cells.

Front

Define endocrine signaling.

Back

A type of signaling that occurs over long distances through hormones released into the bloodstream.

Front

What is paracrine signaling?

Back

A type of signaling where cells communicate with nearby cells.

Front

What is the function of a receptor in signal transduction?

Back

To bind to signaling molecules and initiate a cellular response.

Front

Explain the concept of homeostasis.

Back

The maintenance of a stable internal environment in an organism.

Front

What is the significance of signal transduction pathways?

Back

They allow cells to respond to external signals and coordinate cellular activities.