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Tag: "sense" at biology news

How sneaky HIV escapes cells

...tein ‘Gag’ has both of these properties that cells sense in selecting exosomal cargoes. When the researchers removed the tethers or clumping signals from Gag it could no longer get out of the cell. However, if they were replaced with synthetic membrane anchors and clumping domains Gag regained its ability ...

Migration alert -- How tumor cells home in on the lymphatic system

...e, so if they are close enough to the lymphatic to sense the molecule, they will migrate towards the vessel. Swartz’s group showed that tumor cells secrete this same molecule. Since lymphatics drain fluid, there will always be slow fluid flow going away from the tumor into the lymphatic vessel. This slow f...

Marine phytoplankton changes form to protect itself from different predators

...ising that a single-celled organism can chemically sense the presence of nearby consumers, identify those consumers and change in opposing ways depending on which consumers are present.” The behavior could have implications for global climate change because Phaeocystis blooms play a key role in the carb...

CU study reveals why starling females cheat

...males cheat with males outside their group if they sense their mates are too genetically similar to themselves. Mating with strangers increases their brood's genetic diversity, even though it does not reap additional help. As yet, it is unknown how females detect the genetic similarities between themselves...

Electric fish conduct electric duets in aquatic courtship

... fields from a batterylike organ in their tails to sense their surroundings and communicate their species, sex and social status with other fish. It is also the first study to successfully sort signals in electric fish based on sex. The research, which is the cover story in the July 1 issue of the Journ...

A first -- Hebrew University scientist observes brain cell development in 'real time'

...lfactory bulb of adult mice, providing them with a sense of smell. The development and maintenance of newborn neurons in this area was assessed by time-lapse imaging over several days at different stages of development. Mizrahi revealed that dendritic formation is highly dynamic. Moreover, once incorporate...

New research shows sharks use their noses and bodies to locate smells

Sharks are known to have a keen sense of smell, which in many species is critical for fi...e research team, this is similar to how humans can sense air flow with the small hairs on the face. Until now, it had not been demonstrated that the lateral ...

Detecting cold, feeling pain: Study reveals why menthol feels fresh

...that is most responsible for the body's ability to sense cold. The finding, reported on-line in the journal "Nature" (May 30, 2007), reveals one of the key mechanisms by which the body detects temperature sensation. But in so doing it also illuminates a mechanism that mediates how the body experiences int...

Scripps research team sheds light on long-sought cold sensation gene

...e been postulated to play a role in our ability to sense cool temperatures, but none have withstood the tes...e range of 18 to 31°C, suggesting their ability to sense this range was completely disabled without the gene. Normal mice, on the other hand, found cold temp...

Cancer patients monitor fatigue in real time

...ted fatigue as "an unusual, persistent, subjective sense of tiredness related to cancer or cancer treatment that interferes with usual functioning." Fatigue commonly is one of the first symptoms of cancer, and the longest-lasting symptom following cancer in both children and adults, Hacker said. "For ex...

Corals -- More complex than you?

...ase. There may also be a direct payback, in the sense that, by exploring the ancestral immune genetic repertoire of corals and how it functions in a simple animal, we will gain new insights which will help in the battle against human disease, he adds. The richness of the coral genome ?unexpectedly lo...

How to steer a moving cell

... tips of growing nerve fibers, called axons, which sense guidance signals in their environment and "steer" the axons. Cell movement also requires polarization to position the cell and help navigate its movement. Polarization is characterized by formation of a leading "false foot" or pseudopodium and a tr...

Study of protein folds offers insight into metabolic evolution

...cks for the primitive RNA world, it makes a lot of sense that we've found this origin encased in nucleotide metabolism." ...

Get a whiff of this: Smell test could sniff out serious health problems

... a smell,?Frank explains. “For someone with normal sense of smell, the size of the sniff when detecting an ...an odor are the same.? In humans, Frank says the sense of smell is one of our less robust senses. He says it’s more susceptible to harm because there is le...

NIDA study identifies genes that might help some people abstain from smoking

...y of the genes identified through this effort make sense because of their role in supporting new neural connections in the brain, more research is now needed to understand the actual mechanisms through which they may increase or reduce the rates of successful quitting. Dr. Uhl says he and his colleagu...

Researchers find link between food odors and lifespan in fruit flies

... determine whether loss of olfactory function ?the sense of smell ?had an effect on lifespan. They found th...man longevity and caloric intake, and the role our sense of smell may play in the process, will require more knowledge of the fundamental mechanisms at work,...

Sandia researchers take new approach to studying how cells respond to pathogens

...utational modeling that allows researchers to make sense of data obtained from microfluidic analysis and imaging Real immune cells are short-lived outside of bodies. To do the type of experiments they wanted, the researchers needed cells that can stay alive more than a couple of hours, have the ability ...

Out-of-body experiences may be caused by arousal system disturbances in brain

...ains, it may not be a far off idea that they could sense they were really outside their own body watching t...g asleep or just after awakening, have you had the sense that you are outside of your body and watching yourself?" A similar question was posed to survey out...

Tropical forests -- Earth's air conditioner

...to protect nature," he explains. "It just makes no sense to destroy natural ecosystems in the name of saving natural ecosystems."...

Imaging pinpoints brain regions that 'see the future'

...d time and can consider the future in the abstract sense (e.g., that global warming is a concern for the future), but they cannot vividly envision themselves in a specific future scenario. "The same is true with very small children -- they don't remember particularly what happened last month and they c...

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