AP BIOLOGY

Detailed explanation-1: -Apoptosis is a form of programmed cell death, or “cellular suicide.” It is different from necrosis, in which cells die due to injury. Apoptosis is an orderly process in which the cell’s contents are packaged into small packets of membrane for “garbage collection” by immune cells.

Detailed explanation-2: -A type of cell death in which a series of molecular steps in a cell lead to its death. This is one method the body uses to get rid of unneeded or abnormal cells. The process of apoptosis may be blocked in cancer cells. Also called programmed cell death.

Detailed explanation-3: -The process of programmed cell death may be blocked in cancer cells. Also called apoptosis.

Detailed explanation-4: -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-5: -There are three major forms of programmed cell death: apoptosis, autophagic cell death, and regulated necrosis (sometimes referred to as necroptosis). The term “programmed” in this context implies that the dismantling of the cell is regulated by specific genes and involves the activation of specific molecular pathways.