Tag: "senses" at biology news

Another job discovered for a master metabolic off-switch

...eart rate; blood pressure; endocrine function; the senses of sight, smell and taste; pain tolerance, and the euphoric high of addictive drugs. Thus, new basic knowledge about the action of beta-arrestin could have implications for development of drugs for a wide array of disorders. In an article in the Octo...

Brain's method of creating mental images differs with the source of cues received

...ve differently when receiving information from two senses instead of one? "We rely upon our senses to tell us about the surrounding environment, including an object's size, shape and location," Hilli...

Structure of pain-modulating enzyme described by scientists at the Scripps Research Institute

...skrit word meaning "internal bliss." When the body senses pain, anandamide binds to CB-1 and nullifies pain by blocking the signaling. However, this effect is weak and short-lived as FAAH quickly metabolizes the anandamide--the compound has a half-life of only a few minutes in vivo. In some ways, THC is sup...

St. Jude researchers show that the Six3 gene is vital in the creation of the brains complexity

...critical functions such as thought, memory and the senses of sight and smell. We showed that Six3 is one of the key elements preventing Wnt1 from disrupting normal development of the forebrain, said Oleg V. Lagutin, PhD, a post-doctoral fellow in the Department of Genetics at St. Jude. Lagutin, who works i...

From da Vinci to Monet: Understanding how artists can manipulate the human visual system

...in Impression: Sunrise, an orange sun deceives the senses and appears to shift and flicker in the middle of a dark blue sky. The sun is really, in fact, just as bright (or dull, depending on your perspective) as its surrounding sky. Although it certainly stands out as the focal point of the piece, the sun i...

Getting a handle on sensitive cycles

... is an intrinsic part of how the cell continuously senses estrogen levels." The constant removal of receptors from genes functions like a sort of security camera that takes a fresh picture of estrogen levels in the cell at regular intervals. It guarantees that the cell can respond to changes when they occur...

Scientists identify protein channel that mediates body's ability to feel frigid temperatures

...al (TRP) channel called TRPV1. TRPV1 opens when it senses hot temperatures--above 42 C (108 F). That discovery opened the floodgates for identifying temperature-detecting proteins. Within a few years, several laboratories had identified additional temperature-detecting proteins. Last year, Patapoutian and h...

Small talk--The gabfest of microbial communication

...i, and salmonella," Bassler says. "When V. harveyi senses the AI from other species, it glows brilliantly. In fact, many diverse bacterial functions such as virulence factor production, conjugative DNA transfer, symbiosis, and antibiotic production are now known to be controlled by quorum sensing." Ah spok...

Critical early-defense trigger in plants found

... chemical reaction) that is activated when a plant senses it is being attacked by a pathogen. When activated, the enzyme produces nitric oxide (NO), a hormone that tells the plant to turn on its defense arsenal. According to plant pathologist Daniel F. Klessig, lead author of the Cell paper and president...

The mechanical switch in the ear

...al energy into electrical energy. Unlike the other senses of vision, olfaction, and touch sensation, the mol...te for this long sought channel in zebrafish. Our senses allow us to keep tract of the physical world. The specialized receptors in our eyes, skin and tongue...

How plants get made in the shade

...such as the photoperiod pathway by which the plant senses seasonal change." The identification of a shade-avoidance pathway could have a big impact on agriculture, said Chory. "Crops are planted at such a high density that plants in a field are always shading each other, and probably every plant in that fi...

Social mobility: Study shows bacteria seek each other out

... that those lacking the gene for the receptor that senses that attractant did not cluster as normal bacteria did. Disrupting chemotaxis could be a route to attacking biofilms, a common type of bacterial interaction in which they form a colony that is resistant to antibiotic drugs and chemicals, the research...

Researchers identify new cause of genomic instability

...s sifting through the indispensable machinery that senses and fixes broken DNA have discovered a new culprit that can induce instability in the genome and thereby set the stage for cancer to develop. Studies in mice have shown that loss of H2AX , a gene that produces a protein called a histone that is part...

How AIDS destroys immunity

...apy drugs damage DNA in cancer cells. The ATR gene senses the damage and stops division of the cancer cells, in effect stopping the cancer. In the new study, Planelles and colleagues did not actually show how the AIDS virus' vpr gene triggers ATR to halt the replication of CD4+ white blood cells, but inste...

A little stress may be good for you

...he cell. A master protein called heat shock factor senses the stress and responds by turning on the genes that encode molecular chaperones. Proteins are basic components of all living cells. To do its job properly, each protein first must fold itself into the proper shape. In this process, the protein i...

Do we perceive using 'mindsight'?

... also be at work when someone goes into a room and senses something is different but can't put their finger ... no reason the effect shouldn't operate with other senses too, he says. Knowing someone is behind you may be the auditory equivalent....

New 'Understanding Evolution' Web site provides one-stop-shop for nation's science teachers

..., from simple exercises that get kids to use their senses to explore the natural world to elementary displays of the concept of geologic time and extinction. More than 900 teachers across the country are now part of the evaluation process as the development team continues to improve the Web site. HHMI's fun...

Rockefeller University scientists take on controversial 'vibration theory' of smell

...e couldn't produce them." Smell is the last of the senses to be explained. Most researchers believe in the "lock and key" shape theory, which says the shape of a chemical (the "key") fits into odorant receptor proteins on the outside of cells ("locks") that are dedicated to the sense of smell. Activated rec...

Missing gene a potential risk factor for birth defects

...ns, produces an important protein called ATM which senses DNA damage caused by reactive oxygen species and directs other proteins to repair it. Reactive oxygen species are a normal product of the body's production of energy but can jump to toxic levels when cells are exposed to certain drugs, environmental ...

Chemical reaction in birds provides sense of direction during migratory flights

...ed normal migratory orientation again. Unlike our senses involving vision, hearing, smell and touch, we do not know what receptors underlie magnetoreception, Ritz said. Migratory birds have long been known to possess a magnetic compass that helps them find the correct direction during their migratory fligh...

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