What is the biological process of programmed cell death called?

• A. Necrosis
• B. Apoptosis
• C. Infarction
• D. Autolysis

Answer: (B)

The biological process of programmed cell death is termed apoptosis. This mechanism is crucial for maintaining homeostasis within the body by eliminating cells that are no longer needed or are potentially harmful. Unlike necrosis, which is characterized by uncontrolled cell death often due to injury or infection and can lead to inflammation, apoptosis is a well-regulated and orderly process that allows cells to die without causing damage to the surrounding tissue.

During apoptosis, cellular components are systematically dismantled and packaged for removal, which helps to prevent inflammation and maintain tissue integrity. This process is essential for various physiological functions, such as development, immune response, and the removal of damaged or dysfunctional cells. Apoptosis is mediated by a cascade of signaling pathways and enzymes, including caspases, that orchestrate the cell's dismantling.

The other processes mentioned do not involve the regulated and orderly nature of apoptosis. Necrosis involves cell death due to injury and usually results in inflammation. Infarction refers to tissue death due to a lack of blood supply, and autolysis is the self-digestion of cells after death, usually occurring in tissues after the cessation of blood flow. Thus, apoptosis stands out as the specifically programmed and physiological process of cell death.