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Tag: "roam" at biology news

White blood cell waste disposal system plays critical regulatory role

...ood stream where they migrate out of the blood and roam the body in search of potentially harmful foreign substances. Neutrophils have a short lifespan and often die via a programmed cell death pathway called apoptosis within a matter of hours. Dying neutrophils are recognized and ingested by cells in the...

White Blood Cell 'Waste Disposal' System Plays Critical Regulatory Role

...ood stream where they migrate out of the blood and roam the body in search of potentially harmful foreign substances. Neutrophils have a short lifespan and often die via a programmed cell death pathway called apoptosis within a matter of hours. Dying neutrophils are recognized and ingested by cells in the...

Genetic defects give the immune system the green light to attack the pancreas

...? Left unchecked, the self-destructive T-cells can roam throughout the body and wreak havoc. This is the process behind many autoimmune, or “self-immune,?diseases such as type 1 diabetes, multiple sclerosis, rheumatoid arthritis and others. To understand what happens in type 1 diabetes, the researchers c...

Proposal would allow wild animals to roam North America

...ants, camels and other large wild animals may soon roam parts of North America. "If we only have 10 minutes to present this idea, people think we're nuts," said Harry Greene, professor of ecology and evolutionary biology at Cornell. "But if people hear the one-hour version, they realize they haven't tho...

Chemical guidance of T cells leads to immunologic memory and long-term immunity

...es and become activated. Once active, CD8+ T cells roam throughout the body destroying cells infected with bacteria or viruses--a process known as cell-mediated immunity. When these CD8+ T cells encounter an infected cell, they unleash a torrent of substances that poke holes in the cell's membrane, chew u...

Genetically altered mice no longer like cocaine

... first day of the experiment, mice were allowed to roam around the box. During the next several days, mic...ast day of the experiment, mice were again free to roam the box, and no injections were given. The animals were videotaped while they were in the box. "The...

Researchers add crucial information on how the body's T cells react to parasitic diseases

...ucial importance of T cells--cellular Pac-Men that roam the bloodstream gobbling up infection and guarding against future attacks. While scientists understood how T cells worked in certain kinds of diseases, one area has remained murky: disorders caused by protozoan parasites. Now, because of a study ju...

A dichotomy in migration patterns found for sea turtles in east Atlantic

...shallow coastal waters, others leave Cape Verde to roam the much deeper open ocean along the African coast and exhibit a distinct feeding strategy. Interestingly, while adults compose both groups, the coastal feeding strategy correlates with larger animal size. These new findings revise our understanding ...

Massive herds of animals found to still exist in Southern Sudan

...as sighted where some 10,000 had been estimated to roam in the past.” The team did verify the presence of the largest antelope on earth, the Derby eland, in Southern National Park. “This species has gone extinct over much of its former range, so it is very good news that what we believe is a viable popula...

Threats to wild tigers growing

...rom wild tigers. Because tigers must be able to roam over large areas, long-term conservation of the species will need planning that involves religious and civic leaders as well as national and local governments. International cooperation among nations that harbor the animal will also be essential. Din...

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