AP BIOLOGY

Detailed explanation-1: -If cells are no longer needed, they commit suicide by activating an intracellular death program. This process is therefore called programmed cell death, although it is more commonly called apoptosis (from a Greek word meaning “falling off, ” as leaves from a tree).

Detailed explanation-2: -Definition. Apoptosis is the process of programmed cell death. It is used during early development to eliminate unwanted cells; for example, those between the fingers of a developing hand. In adults, apoptosis is used to rid the body of cells that have been damaged beyond repair.

Detailed explanation-3: -Apoptosis occurs normally during development and aging and as a homeostatic mechanism to maintain cell populations in tissues. Apoptosis also occurs as a defense mechanism such as in immune reactions or when cells are damaged by disease or noxious agents (Norbury and Hickson, 2001).

Detailed explanation-4: -Apoptosis: is a form of cell death that prevents immune activation. Apoptotic cells have a particular microscopic appearance. The cell activates proteins called caspases that are normally dormant. These caspases dismantle the cell from within.

Detailed explanation-5: -Also called programmed cell death.