Tag: "spines" at biology news
Component In Soy Products May Be Substitute For Estrogen Treatment
...vements in thebone densities in the women's lumbar spines
-- a key location for assessingosteoporosis, a common disorder of aging women that is marked by a progressiveloss of bone tissue because of a loss of bone calcium and protein. The group that consumed the isolated soy proteins, regardless of isoflavo...
Gene Mutation Found For Common Form Of Mental Retardation
...ransmission is accompanied by movement at the tiny spines
locatedalong the neuron's receiving arms, or dendrites. The spines, which accept inputfrom the axons of other nerve cells, appear to contract and expand, increasing ordecreasing the ease with which the dendrites conduct electrical impulses. ...
Invading Pests Harm People, Plants And Animals
...ile young shootscan be grazed by cattle, the sharp spines
of older starthistle plants deter cowsfrom feeding. Yellow starthistle also can be toxic to horses that eat it. To control the invasive weed, scientists are attacking it with a varietyof methods -- biological, chemical and mechanical. ...
Birds beware! Pinecones armed and dangerous
...bill (Loxia curvirostra). The researchers removed spines
from some open and closed ponderosa pine (Pinuspon...s pungens) cones. Other cones wereleft with their spines
intact. Crossbills were then allowed to eat seeds from the different types of cones, andthe time tak...
A dream team tackles the brain
...ofunraveling the century-old question of how these spines
function," she states."We know that they are crucial to cognitive processes such as learning andmemory, but we know little about how they work, primarily because they are sosmall that they challenge existing optical imaging techniques needed tovisual...
Fragile X brain synapses mostly undeveloped, researchers say
...eloped spines; mostly long, narrow and undeveloped spines
protrude fromthe nerve cells in Fragile X brains. ...g andmemory. When stimulated in early development, spines
in normal brain tissue rapidlyrecord the experience, generate protein, grow and mature, forming acha...
New link uncovered in nerve cell mechanism thought to power learning and memory
...concluded that the movement of AMPA receptors into spines
could be an important mechanism that contributes t...whether the AMPA receptors we observed moving into spines
are actually incorporated into synapses and participate in synaptic transmission," says Malinow. "An...
Protein stimulates key link between nerve cells, suggesting possible target for mental retardation and nerve regeneration therapies
..., increasing the number and size of the dendritic spines
that hold glutamate receptors, and increasing the ...rdation is associated with a loss of the dendritic spines
on post-synaptic neurons that play a role in receiving glutamate messages. As the study shows that ...
Scientists reveal details of brain cell communication: implications for learning & memory
...xtremely close look at the properties of dendritic spines
and synapses that govern brain function. "Ou... to watch as calcium rushed-in to single dendritic spines
of these neurons (see figure). These measurements enabled the researchers to determine the number an...
New research aims to help rowers take the strain off their backs
...scanner. This meant the researchers could scan the spines
of rowers in simulated rowing positions within the scanner, allowing verification of the current study. Both British Olympic gold-medal winning rowers and novice oarsmen are now set to benefit from a novel scientific research programme into rowing te...
Antarctic sea urchin shows amazing energy-efficiency in nature's deep freeze
... pincushion, about 5 inches in diameter, with long spines
extending from its round shell. It lives on the seafloor and uses its spines
and sucker-tipped tube feet to move about. Baby sea urchins are spawned during the summer months and...
Geologists find spines make comfy home for some marine organisms
...ti geologist will explain how marine organisms use spines
for more than self-defense during a presentation W... yearlong study in the Florida Keys looking at how spines
and other shell decorations affected the number of epibionts present. Epibionts are organisms that g...
Molecular basis of mental retardation uncovered
...ng certain proteins outto the individual dendritic spines
of neurons, and/or subsequentlyactivating them at the appropriate time during development, as well asduring adult memory formation," says Jennifer Darnell. "This would explainhow specific neuronal connections are strengthened to form memories." Meanw...
Fish may show how nature diversifies
...a single chromosome region. The fish use these spines
for defense against predators, said Kingsley. The total length of these spines
sets the cross-sectional diameter of the fish, which helps determine whether or not they get eaten b...
Battle of the sexes leads to evolutionary arms race
...e with her. To counteract this, the female evolved spines
that hold the male away from her body and foil his...les evolved grasping hooks while females developed spines
- but also indicates that such conflicts can promote the generation of new species, they say....
Max-Planck doctoral student discovers 'living fossils'
...erved in amber, indicate a predatory diet. Rows of spines
on the front and middle legs indicate that the animal held on to its prey with its legs, as some insect-eating locusts (Orthoptera) do. A more detailed description of the new insect order "Mantophasmatodea" will appear in the autumn in the journal "Z...
Ecological significance of tool-use in the woodpecker finch Cactospiza pallida
...hes of the Galapagos Islands, uses twigs or cactus spines
to pry insects and spiders out of tree-holes. The advantage of using tools may seem evident, but empirical evidence is scarce. In a paper soon to appear in Ecology Letters, Tebbich and colleagues present the first study on the ecological relevance o...
Study: Isoflavone-enriched soy proteins fail to increase bone mineral density in young women
...ords, they scanned the young women's whole bodies, spines
and upper thighbones to determine how dense their bones were and if those measurements changed over time. The team also controlled for each woman's body mass index -- a measure of how heavy she was for her height along with her physical activity lev...
Brazilian shellfish may improve understanding of ancient world
...ers. Grooves seem to encourage colonization, while spines
discourage it." However, looking at the variability in encrustation at a range of depths along the approximately 300 miles of the shelf, Rodland has determined that the amount of plankton in the water is more likely a driving factor than depth alone ...
Researchers reveal new secrets of the brain
...hecked to see which neurons sent out and retracted spines
to form and eliminate connections with other neurons. To see if the changing connections were influenced by sensory input they cut every other whisker on the mice, creating a chessboard pattern in which each cut whisker was surrounded by uncut whiske...