Agriculture
Where Have All the Bees Gone?
Chicken Eggs as Drug Factories
Growing Healthier Tomato Plants
Amphibians
Toads
Frogs and Toads
Poison Dart Frogs
Animals
Putting a Mouse on Pause
Lives of a Mole Rat
Ultrasonic Frogs Raise the Pitch
Behavior
Calculating crime
From dipping to fishing
Baby Number Whizzes
Birds
Emus
A Meal Plan for Birds
Hawks
Chemistry and Materials
Heaviest named element is official
Pencil Thin
The newest superheavy in town
Computers
Troubles with Hubble
Electronic Paper Turns a Page
Galaxies on the go
Dinosaurs and Fossils
Dinosaur Eggs-citement
Supersight for a Dino King
An Ancient Spider's Web
E Learning Jamaica
2014 GSAT Results for Jamaican Kids
Results of GSAT are in schools this week
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Earth
Slip Slidin' Away—Under the Sea
Unnatural Disasters
Ancient Heights
Environment
Catching Some Rays
Lessons from a Lonely Tortoise
Saving Wetlands
Finding the Past
Chicken of the Sea
Preserving Ancient Warrior Paint
Ancient Art on the Rocks
Fish
Sharks
Barracudas
Bass
Food and Nutrition
Recipe for Health
Symbols from the Stone Age
A Pepper Part that Burns Fat
GSAT English Rules
Finding Subjects and Verbs
Capitalization Rules
Order of Adjectives
GSAT Exam Preparation Jamaica
Scotiabank Jamaica Foundation Grade Six Achievement Test (GSAT) Scholarships
The Annual GSAT Scholarships
10 Common Mistakes When Preparing for the GSAT Math Test
GSAT Exams Jamaica Scholarships
2014 GSAT Results for Jamaican Kids
Access denied - Disabled boy aces GSAT
42,000 students will sit for the GSAT Exam in two weeks
GSAT Mathematics
10 Common Mistakes When Preparing for the GSAT Math Test
How a Venus Flytrap Snaps Shut
GSAT Practice Papers | GSAT Mathematics | Maths
Human Body
Sea Kids See Clearly Underwater
Gut Germs to the Rescue
Hear, Hear
Invertebrates
Centipedes
Wasps
Horseshoe Crabs
Mammals
Platypus
Hamsters
Lion
Parents
Choosing a Preschool: What to Consider
Expert report highlights the importance to parents of reading to children!
Raise a Lifelong Reader by Reading Aloud
Physics
Black Hole Journey
Project Music
Einstein's Skateboard
Plants
Tracking the Sun Improves Plant Pollen
Making the most of a meal
Plants Travel Wind Highways
Reptiles
Crocodiles
Boa Constrictors
Garter Snakes
Space and Astronomy
Zooming In on the Wild Sun
Sun Flips Out to Flip-Flop
A Planet from the Early Universe
Technology and Engineering
Reach for the Sky
Weaving with Light
Shape Shifting
The Parts of Speech
Countable and Uncountable Nouns
What is a Preposition?
What is a Verb?
Transportation
Robots on the Road, Again
Seen on the Science Fair Scene
Morphing a Wing to Save Fuel
Weather
A Change in Climate
The Best Defense Is a Good Snow Fence
Recipe for a Hurricane
Add your Article

Fighting fat with fat

he human body hides more than one kind of fat. White fat cells, which we usually think of when we think of fat, store energy. But brown fat is different: It’s a type of fat that burns energy and gives off heat. When you were born, you had a pad of brown fat on your back, and it helped you control your body temperature. Mice also have brown fat on their backs. Until now, scientists suspected human adults don’t have brown fat — or if they do, the brown fat is not important. Three recent studies show that human adults do have brown fat, and it may be important for controlling body weight. And unlike babies, adults store brown fat in the neck, abdomen, above the collarbone and along the spine. In the first study, researcher Ronald Kahn of the Joslin Diabetes Center and Harvard Medical School in Boston looked at the medical records of nearly 2,000 people who had received a PET-CT scan. To get a PET, or positron emission tomography, scan, a person is injected with a chemical that emits particles called positrons. Inside the person’s body, these positrons create radiation called gamma rays, which pass through the body and are detected by special machines outside the body. This type of scan provides a three-dimensional picture of what’s going on inside the body. PET scans are often used to diagnose cancer. A CT scan uses X-rays to see inside a body. Kahn and his team found brown fat in the scans of 3.1 percent of the men studied and 7.5 percent of the women. People younger than 50 and lean people were more likely to have brown fat. “It is now without dispute that brown fat is present in adult humans,” Kahn says. When the researchers checked the scans against the weather records, they found that brown fat was more likely to show up when the temperature outside was cold. This comparison suggests brown fat burns more energy in colder temperatures. The connection between brown fat and temperature was explored in the second study. Dutch researchers took scans of lean and overweight men at two temperatures, 72 degrees Fahrenheit (room temperature) and 61 degrees Fahrenheit. At the higher temperature, brown fat barely appeared on the scans. But when the temperature dropped, brown fat appeared on the scans of the leaner men. The more overweight the man, the less brown fat appeared. The third study, conducted by Swedish scientists, also found evidence of brown fat in adults. These studies suggest that brown fat may burn more energy in people who are lean. The connection between brown fat and being overweight is less clear. Scientists wonder: Does having less brown fat cause a person to become overweight, or does being overweight reduce the amount of brown fat in a person? In other words, overweight people may be overweight partially because they don’t have enough brown fat to help burn energy. On the other hand, their excessive amount of white fat may keep the brown fat from burning energy. Power words: (from Britannica.com and the Yahoo! Kids Dictionary) PET scan: Positron emission tomography, an imaging technique used in medical diagnosis and biomedical research. It has proved particularly useful for studying brain and heart functions, as well as diagnosing cancer. CT scan: Imaging method that uses a low-dose beam of X-rays that crosses the body at many different angles. Brown fat: A dark-colored tissue in many mammals that generates heat to regulate body temperature, especially in hibernating animals.

Fighting fat with fat
Fighting fat with fat








Designed and Powered by HBJamaica.com™