DaBrAt37Colorado Potato Beetle, medium-sized beetle, member of the leaf beetle family, serious threat to potato crops. Colorado potato beetles are native to the eastern Rocky Mountain region of the United States. Before potatoes were widely cultivated in North America, these beetles fed on food plants belonging to the nightshade family. When potatoes began to be cultivated in the United States in the mid-19th century, the beetles were provided a vast new food supply, since the potato plant is a member of the nightshade family. The Colorado potato beetle rapidly infested the potato-growing regions of North America. It was accidentally introduced into Europe in 1922, but its spread has been slowed by rigorous extermination efforts.
Both larvae and adult beetles feed on potato foliage, though they sometimes also consume vegetables and flowering plants. The Colorado potato beetle typically lays bright yellow eggs in clusters on the underside of leaves. Several generations of the insect can reproduce in a single year. .
Scientific classification: The Colorado potato beetle is a member of the family Chrysomelidae. It is classified as Leptinotarsa decemlineata.
The function of Leptin Essay title: ?Leptin is not simply an appetite suppressant.? ... This is too simplistic a description of leptin's actions. ... Firstly, leptin as an appetite suppressant. ... These less fat mice that lack both leptin and NPY suggests that NPY is a central effector of leptin deficiency. ...
In general, the greater the body mass is and percent of fat, the higher the levels of leptin. ... Leptin levels vary greatly though from person to person. ... Women have a considerably higher quantity of leptin than men, but when being compared by percent of body fat, men and women have comparable leptin levels. ... If humans being obese dealt with the idea of having low leptin levels, then it might be possible to have obesity treated with a supplemental leptin, but it appears that it does not deal with the lack of producing leptin. ... After obese individuals diet, the leptin levels drop,...
Clairice Beckett Leptin and Obesity: Is There Really a Connection? To be able to discuss Leptin's affects on obesity, one must know what leptin is. ... Leptin is produced by fat cells and sent to the hypothalamus. ... Friedman says, "After dieting, the levels of leptin drop, suggesting that less leptin is made and available to signal to the brain. ... Is leptin the answer to combating obesity? ...
Without the proper amount of sleep, our bodies drive leptin levels down. Leptin and ghrelin are hormones that work together. Ghrelin stimulates appetite and causes leptin to force a signal to the brain, letting the body know when it the appetite is satisfied. For people who don't consistently get eight hours of sleep, leptin levels are lower and can lead to overeating. ...
One of the most successful discoveries of curing obesity is leptin, which is the hormone that regulates body weight. This hormone was first discovered at the Jackson Laboratory in 1950, "Leptin, which is made by the body's fat cells, is the linchpin in a complex endocrine system that not only maintains the body's weight in a narrow range, but also exerts powerful effects on other aspects of physiology related to an organism's nutritional state" (Rockefeller University, n.d.) Leptin, due to the fat cells, is produced into the bloodstream and regulates the patient'...
In her book, The Hungry Gene, Ellen Shell promoted the idea that leptin may be one of the causes of obesity (Causes, 2003). Leptin is a naturally occurring hormone that controls the appetitie. When full, fat cells release the hormone leptin, it curbs the appetite (Causes, 2003). If leptin production is changed, the fat cells are unable to signal that they are full and weight gain occurs. Research into leptin is just beginning (Causes, 2003). ...
Leptin, a naturally occurring hormone, which controls the appetite, is a very important genetic factor of obesity. When full, fat cells release appetite curbing hormone, leptin. If leptin production is hindered, the fat cells are unable to signal that they are full and weight gain occurs (Shell 100). Though scientists discovered leptin in the 1990s, as of August 2001, only a few individuals have had abnormalities related to leptin. ...
Fat cells secrete a protein called leptin which is caused by a gene called obese; ob for short. When peoples leptin levels are normal they eat just enough to maintain their weight. Despite this scientific discovery, increasing a person's leptin levels does not help them lose weight. ...
Leptin, which induces the brain to regulate the food is useless in some people and this some doctors believe was a trait passed down from the genetic pool (Abraham 35-44). The lack of the Leptin causes people to eat without realizing that they are actually full. ...
