Agriculture
Silkís superpowers
Flush-Free Fertilizer
Cleaning Up Fish Farms
Amphibians
Salamanders and Newts
Newts
Toads
Animals
Roboroach and Company
Hearing Whales
New Monkey Business
Behavior
GSAT Mathematics Quiz, Teaching Math, teaching anxiety
Baby Talk
The case of the headless ant
Birds
Dodos
Swifts
Nightingales
Chemistry and Materials
These gems make their own way
Revving Up Green Machines
Gooey Secrets of Mussel Power
Computers
New twists for phantom limbs
Seen on the Science Fair Scene
Look into My Eyes
Dinosaurs and Fossils
A Dino King's Ancestor
The man who rocked biology to its core
Dinosaur Dig
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
Petrified Lightning
On the Trail of America's Next Top Scientists
Arctic Algae Show Climate Change
Environment
Fungus Hunt
Bald Eagles Forever
Ready, unplug, drive
Finding the Past
A Plankhouse Past
Words of the Distant Past
Settling the Americas
Fish
Electric Catfish
Flounder
Hammerhead Sharks
Food and Nutrition
Food for Life
Symbols from the Stone Age
Recipe for Health
GSAT English Rules
Finding Subjects and Verbs
Capitalization Rules
Order of Adjectives
GSAT Exam Preparation Jamaica
42,000 students will sit for the GSAT Exam in two weeks
10 Common Mistakes When Preparing for the GSAT Math Test
GSAT Practice Papers | GSAT Mathematics | Maths
GSAT Exams Jamaica Scholarships
Access denied - Disabled boy aces GSAT
GSAT Exam Preparation
2014 GSAT Results for Jamaican Kids
GSAT Mathematics
GSAT Mathematics Quiz, Teaching Math, teaching anxiety
Math is a real brain bender
42,000 students will sit for the GSAT Exam in two weeks
Human Body
Nature's Medicines
A Better Flu Shot
Sun Screen
Invertebrates
Beetles
Mosquitos
Earthworms
Mammals
Deers
Felines
Sloth Bears
Parents
Expert report highlights the importance to parents of reading to children!
How children learn
What Not to Say to Emerging Readers
Physics
Echoes of a Stretched Egg
Hold on to your stars, ladies and gentlemen
The Particle Zoo
Plants
Nature's Alphabet
Hungry bug seeks hot meal
The algae invasion
Reptiles
Reptiles
Lizards
Gila Monsters
Space and Astronomy
A Whole Lot of Nothing
Sounds of Titan
Tossing Out a Black Hole Life Preserver
Technology and Engineering
A Light Delay
Young Scientists Take Flight
Machine Copy
The Parts of Speech
What is a Verb?
Problems with Prepositions
What is a Preposition?
Transportation
Middle school science adventures
Flying the Hyper Skies
How to Fly Like a Bat
Weather
Science loses out when ice caps melt
The Best Defense Is a Good Snow Fence
A Change in Climate
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: Itís 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 donít have brown fat ó 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 personís 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 whatís 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. ďIt is now without dispute that brown fat is present in adult humans,Ē 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 donít 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™