Articles tagged with Animal Physiology
A new method for modifying mycotoxins in contaminated grains has been developed using transgenic yeast. The research, published in Biotechnology for Biofuels, shows that the yeast can convert toxic trichothecene mycotoxins to less toxic forms during fermentation.
The Perspectives in General Physiology series provides an in-depth look at the mechanisms of sensory information processing, including visual, auditory, olfactory, and tactile processes. The series reveals key strategies used by researchers to quantify and characterize sensory information across multiple systems.
Researchers found that male rock ptarmigans can run up to 50% faster than females due to superior physiology, enabling them to defend larger territories and successfully breed. This study highlights the importance of considering physiological factors in understanding animal behavior and breeding success.
Researchers aim to create a 'virtual rat' model to predict and understand physiological function and disease, filling a gap in understanding complex diseases. The Virtual Physiological Rat (VPR) project will use computer simulations to translate findings from animals to humans, targeting diseases like hypertension and heart failure.
Researchers used human hearts to replicate a mouse study on KATP ion channel drug targets, finding one target ineffective in humans. The findings underscore the importance of translating results from animal models to clinical trials in cardiovascular research.
Scientists have found a heat-detecting molecule called TRPV1 on the noses of vampire bats, which helps guide their bites to veins. This discovery highlights how small genetic changes can lead to major evolutionary adaptations.
A recent review article highlights the positive effects of exercise on brain health and cognition, with aerobic exercise improving cognitive abilities in children and elderly adults. Strength training also shows promise, particularly for executive functions and memory.
Researchers used a new technique to determine dinosaur body temperatures, finding that sauropod dinosaurs had temperatures similar to those of modern mammals. The study provides insights into dinosaur physiology and suggests alternative explanations for their metabolism and behavior.
Researchers from Caltech have developed a new approach to measure dinosaur body temperatures, providing new insights into their physiology. They found that sauropod dinosaurs had body temperatures similar to those of most modern mammals, ranging from 35.7°C to 38.2°C.
The Journal of Dairy Science Most Cited Awards recognize contributors whose work significantly impacts research and the dairy industry. The awards were given to authors of the top-cited papers in four sections: Dairy Foods, Physiology and Management, Nutrition, Feeding and Calves, and Genetics and Breeding.
Researchers found that mice on high-fat diets who received extra leucine showed improved glucose tolerance and insulin sensitivity. Adding leucine to the diet improved metabolic health in animals with prediabetes or metabolic syndrome.
Research at Queen's University found that stressed birds have higher reproductive success and offer better care to their young. Female tree swallows with increased stress hormones fed their nestlings more frequently.
A new study identifies the ion channel TRPA1 as the molecular sensor responsible for detecting weak acids in animals. This detection mechanism can trigger cell death and is why animals avoid weak acids, which are found in substances like vinegar and fermented foods.
Researchers find that marine diatoms have a functional urea cycle, allowing them to recycle carbon and nitrogen from their environment. This discovery reveals a surprising evolutionary link between diatoms and animals.
A Penn State study reveals that obesity impairs skeletal muscle function in rats, leading to impaired muscle strength and locomotion. The research suggests that the muscles of obese mammals are not properly 'tuned' to their body weight.
Giant hummingbirds use more energy for their body size than smaller hummingbirds do, but still below the upper metabolic limit. Asexual fish hybrids have lower physiological performance, possibly due to increased reproductive advantage over sexual dace. Small sea birds hold heat rather than increasing metabolism
Daily walks increase insulin sensitivity, improve liver health marker PUI, and boost hormone adiponectin levels, linked to fat-burning effects. The study suggests exercise as a medicine for managing non-alcoholic fatty liver disease.
Researchers found that walking for one hour a day improved insulin sensitivity, increased adiponectin levels, and reduced oxidative damage in obese individuals with prediabetes. This exercise regimen may help slow the progression of nonalcoholic fatty liver disease.
A recent study found no significant impact of hormonal status on eight distinct voice parameters in women. The researchers assessed 175 voice samples from 35 participants and used computerized acoustical analysis to measure various voice characteristics.
Researchers have found that obesity can impair the body's natural circadian rhythms, particularly in the cardiovascular system. The study suggests that this disruption can lead to a range of health problems, including impaired heart function and an increased risk of disease.
Researchers found no significant impact of hormonal status on eight voice parameters, contradicting previous studies. Voice samples taken at different points in the menstrual cycle showed consistent characteristics, regardless of hormonal phase.
Researchers at the University of Bristol discovered that domestic hens exhibit a clear physiological and behavioral response to mild chick distress, suggesting an empathic capacity. The study used both behavioral and physiological methods to measure these traits in birds.
New research from Karolinska Institutet shows that nitrate improves mitochondrial function in humans, consuming less oxygen and producing more ATP per molecule. This finding has significant implications for sports physiology and may also have positive effects on diseases involving mitochondrial dysfunction.
Scientists studied arctic ptarmigan to understand how they cope with extreme environments, discovering their efficient gaits and energy-saving strategies that could improve domesticated breeds' welfare and meat yield. The research aims to prevent future food security crises by breeding birds that can store energy efficiently.
Researchers discovered that humans share a method of sensing oxygen with the simplest known living animal, Trichoplax adhaerens. This finding suggests that the oxygen-sensing mechanism evolved around 550 million years ago, coinciding with the emergence of complex multicellular animal life.
The mangrove killifish uses its skin to maintain ion balance, exchanging ions through the skin cells called ionocytes. The fish can also adapt to varying salinity levels, with skin ionocytes getting bigger in response to saltwater and returning to normal size when returned to water.
Researchers have discovered that different odorant receptors in mammals exhibit varying degrees of basal activity, driving receptor current fluctuations and firing patterns. This study suggests new information is used by the olfactory system for categorizing odorants, challenging previous understanding of odor coding complexity.
A high-fat Western diet has been found to exacerbate the inflammatory response to sepsis, a condition of systemic bacterial infection. This increased inflammation can lead to severe outcomes, including higher mortality rates and more morbidity in obese patients.
A study by Hebrew University researcher Prof. Guy Bloch found that honeybees can alter their biological clocks in response to changes in their social role, enabling them to make a 'quick switch' in their daily routines. This flexibility is striking, as humans and most other animals struggle with drastic schedule changes.
Research reveals that warmer temperatures in the tropics have a significant impact on life, even with small temperature increases. The study analyzed nearly 500 million temperature readings and found that metabolic rates increase faster in warmer temperatures, leading to greater effects in tropical regions.
Researchers found that coastal animals have a decreased ability to fight off infection of Vibrio bacteria when exposed to low oxygen and high carbon dioxide conditions. This makes them more vulnerable to infection, especially with injuries or wounds exposed to the water.
Researchers warn that increasing global temperatures will lead to devastating effects on desert bird populations, with even minor temperature increases doubling water loss rates and reducing survival times. Small birds may face reduced survival times of up to 30-40% during heat waves.
Researchers found that synchronized male flashing is more recognizable to females, suggesting a physiological problem in the females' information processing. This phenomenon helps maintain the fidelity of the signal in crowded areas with many unrecognizable flashes.
A 50-year study on Isle Royale has discovered a significant link between osteoarthritis in moose and early malnutrition, which also affects humans. The research found that moose experiencing malnutrition as young adults are more likely to develop arthritis later in life.
Researchers have successfully visualized lipid ordering in a whole, living vertebrate organism for the first time. The study reveals that membrane lipid order plays an important role in cellular processes and may be linked to human pathologies.
A study using fMRI found that looking at photos of a former partner stimulated key brain areas involved in motivation, reward and addiction. The brain's attachment system showed signs of recovery over time, suggesting hope for those coping with rejection.
Researchers found that raising juvenile salmon at 16°C causes skeletal deformities. Fast growth temperatures disrupt bone and cartilage production, leading to increased deformity rates. The study suggests temperature-induced growth is severely affecting osteoblasts and chondrocyte cells.
Research shows that cane toads can adapt well to rising temperatures, with their oxygen transport system becoming more efficient as heat rises. The findings contradict previous studies suggesting a decrease in efficiency at high temperatures, and may have implications for other anurans.
A review of studies on IVM fertility treatment suggests that babies born after IVM may be more likely to have larger offspring syndrome and experience difficult births requiring caesareans. The authors urge caution in the use of IVM until further studies can clarify their findings.
A mathematical model reproducing sleep patterns for multiple species suggests the neural circuitry controlling human sleep may be universal across mammals. The study reveals fundamental physiological mechanisms underlying diverse sleep patterns, with implications for understanding evolution and diversity in mammalian sleep.
Researchers at Indiana University School of Medicine successfully treated acute kidney injury in laboratory experiments using genetically reprogrammed cells producing a protein that aids kidney development. The treatment, administered intravenously, showed significant improvements in kidney function and reduced physical damage.
Resveratrol supplementation has been shown to decrease energy intake by 13% and increase resting metabolic rate by 29% in mouse lemurs. The study demonstrates the compound's potential effects on obesity therapies, providing novel information on its impact on energy metabolism.
A new study by The Endocrine Society reveals that chemicals remaining in Boulder Creek after wastewater treatment change the gender of fish. Native male fish were found to be feminized, with intersex individuals also present downstream of the wastewater treatment plant.
A new model developed by researchers predicts an individual's vitamin D requirements based on their skin tone, sun exposure, and dietary habits. The model suggests that individuals with relatively low sun exposure may need additional vitamin D to reach a target blood level of 75 nanomoles per liter.
Robert H. Wurtz's groundbreaking research on visual information processing and eye movements has led to a deeper understanding of how the brain controls behavior. His discoveries have inspired hundreds of scientists to study cognitive processes, including attention and perception.
A Caltech-led team has developed a new method for measuring the body temperatures of extinct vertebrates using rare isotopes in bones, teeth, and eggshells. This technique allows scientists to reconstruct ancient climates and understand how warm-bloodedness emerged in dinosaurs and other species.
Researchers have successfully recreated mammoth haemoglobin using ancient DNA from Siberian specimens. The team's findings reveal unique physiological adaptations that allowed mammoths to survive in harsh Arctic conditions, enabling them to cool their extremities and minimize heat loss.
A study by Amdam et al. found a positive correlation between honeybee associative learning performance and metabolic stress resilience, independent of social factors. The relationship suggests that central nervous system function and metabolic biology can be associated, providing insights into how to reduce human health disparities.
Recent biologging studies reveal surprising behaviors, such as Atlantic bluefin tuna's 5,000-foot dives and elephant seals' annual 40,000-mile migrations. The research also provides insights into ocean animals' physiological parameters, environmental preferences and conservation status.
Scientists at UH found that better food from high-latitude plants may explain why animals grow bigger in cold climates. The study suggests considering ecological interactions beyond traditional physiological responses to temperature.
A study using genetically modified mice reveals a previously unidentified mechanism contributing to heart failure, specifically the decreased release of neurotransmitter acetylcholine. This finding opens up a new avenue for treating failing hearts and highlights the significance of acetylcholine regulation in cardiac function.
Researchers at Kansas State University found that antioxidants can cause harm by suppressing key signaling mechanisms necessary for muscle function. The study suggests that increasing blood flow and oxygen delivery to the skeletal muscle is crucial during physical activity.
Researchers found that naked mole rat brain tissue can survive for over half an hour without oxygen, which could lead to new treatment options for brain injuries caused by heart attacks, strokes, and accidents. This adaptation may also provide insights into how to prevent permanent human brain damage after temporary loss of oxygen.
A study published in PNAS reveals that food intake plays a crucial role in regulating liver gene expression, rather than the body's circadian clock. The findings suggest that consistent feeding schedules can have a significant impact on metabolism and may help explain why shift workers are more prone to metabolic syndrome.
A new study found that rats exposed to fuel vapor from both leaded and unleaded gasoline exhibited increased aggressive behavior. Exposure to either type of fuel vapor led to significant changes in brain chemistry, including fluctuations in neurotransmitters.
A study suggests that many dinosaurs were probably endothermic, athletic animals due to their high energy requirements during walking and running. This trait may have enabled them to thrive in various habitats, including colder regions, allowing them to cover the entire Mesozoic landscape.
Research suggests that many dinosaur species were probably endothermic, with the potential for athletic abilities rivalling those of present-day birds and mammals. This would have allowed them to inhabit colder habitats, but also required a constant supply of fuel due to rapid metabolisms.
Researchers at the University of Maryland have created a fruit fly model to study the genetics of human diabetes. The model uses genetic approaches to delete specific genes involved in insulin production, resulting in elevated blood sugar levels and symptoms similar to human Type 1 diabetes.
A German study has found that wild pigs and deer do not spread genetically modified (GM) corn through their feces or accumulate transgenic residues in their meat. The researchers fed GM-fed wild boars and fallow deer conventional maize, but found no evidence of germinable seeds in their feces.
Researchers analyzed a fossilized tracksite in southern Africa, discovering how early dinosaurs adjusted their movements to cope with slippery and sloping terrain. The study provides insight into the later evolution of the group, highlighting differences in walking styles between ornithischians and theropods.