Front

What is apoptosis?

Back

Apoptosis is a form of programmed cell death that occurs in multicellular organisms, characterized by a series of biochemical events leading to cell changes and death.

Front

What is the first step of apoptosis?

Back

The first step of apoptosis is the destruction of DNA within the cell.

Front

What are plasmodesmata?

Back

Plasmodesmata are microscopic channels that traverse the cell walls of plant cells, allowing for the exchange of small soluble compounds and communication between neighboring cells.

Front

What type of signaling occurs when a cell signals itself to grow and divide?

Back

This is known as autocrine signaling.

Front

What is paracrine signaling?

Back

Paracrine signaling is a form of cell signaling in which the target cell is close to the signal-releasing cell, allowing for localized communication.

Front

What is the role of gap junctions?

Back

Gap junctions are specialized intercellular connections that allow for direct communication between adjacent cells, facilitating the transfer of ions and small molecules.

Front

Define endocrine signaling.

Back

Endocrine signaling involves the release of hormones into the bloodstream, allowing for long-distance communication between cells.

Front

What is the significance of programmed cell death?

Back

Programmed cell death, or apoptosis, is crucial for maintaining homeostasis, eliminating damaged or unnecessary cells, and shaping the development of tissues.

Front

What is the difference between autocrine and paracrine signaling?

Back

Autocrine signaling occurs when a cell targets itself, while paracrine signaling involves communication between nearby cells.

Front

What is the function of cell signaling in multicellular organisms?

Back

Cell signaling is essential for coordinating various physiological processes, including growth, immune responses, and tissue repair.