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Apoptosis

Babylon English English dictionary

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apoptosis
n. programmed cell death, natural process in which a cell disintegrates after reaching a certain age or due to poor cell health

Wikipedia English The Free Encyclopedia

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Apoptosis
Apoptosis (from Ancient Greek ἀπόπτωσις "falling off") is a process of programmed cell death that occurs in multicellular organismsBiochemical events lead to characteristic cell changes (morphology) and death. These changes include blebbing, cell shrinkage, nuclear fragmentationchromatin condensationchromosomal DNA fragmentation, and global mRNA decay. Between 50 and 70 billion cells die each day due to apoptosis in the average human adult. For an average child between the ages of 8 and 14, approximately 20 billion to 30 billion cells die a day.

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WordNet 2.0 Dictionary

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apoptosis

Noun
1. a type of cell death in which the cell uses specialized cellular machinery to kill itself; a cell suicide mechanism that enables metazoans to control cell number and eliminate cells that threaten the animal's survival
(synonym) programmed cell death, caspase-mediated cell death
(hypernym) necrobiosis, cell death


NCI Dictionary of Cancer Terms

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apoptosis
[AY-pup-TOE-siss]
A type of cell death in which a series of molecular steps in a cell leads to its death. This is the body's normal way of getting rid of unneeded or abnormal cells. The process of apoptosis may be blocked in cancer cells. Also called programmed cell death. 

A Service of the National Cancer Institute.

Common Terms in Evolutionary Biology and Genetics Dictionary

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Apoptosis
The genetically programmed death of cells at specific times during embryogenesis, metamorphosis, and during cell turnover in adults.


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