Encyclopedia > Neutrophil

  Article Content

Neutrophil

Neutrophils are white blood cells and part of the immune system. They are the most common PMN (polymorphonuclear granulocytes[?]), constituting about 99% of them. PMNs account for 70% of all leukocytes. Neutrophils are active phagocytes capable of only one phagocytic event, expending all of their glucose reserves in an extremely vigorous respiratory burst[?]. Being highly-motile, neutrophils quickly congregate at a focus of infection. They are much more numerous than the longer-lived monocytes/macrophages. The first phagocyte a pathogen is likely to encounter is a neutrophil. Some authorities feel that the short lifetimes of neutrophils is an evolutionary adaptation to minimize propagation of those pathogens that parasitize phagocytes. The more time such parasites spend outside a host cell, the more likely they will be destroyed by some component of the body's defenses.



All Wikipedia text is available under the terms of the GNU Free Documentation License

 
  Search Encyclopedia

Search over one million articles, find something about almost anything!
 
 
  
  Featured Article
Canadian Charter of Rights and Freedoms

... Rights Division who brought a more modern human rights perspective to these documents than had been enshrined in the British Bill of Rights or the United States Bill of ...

 
 
 
This page was created in 23.7 ms