The distal convoluted tubule has a different structure and function to that of the proximal convoluted tubule. Cells lining the tubule have numerous mitochondria to produce enough energy (ATP) for active transport to take place.he distal convoluted tubule has a different structure and function to that of the proximal convoluted tubule. Cells lining the tubule have numerous mitochondria to produce enough energy (ATP) for active transport to take place.
Obesity is officially classified as a disease under the World Health Organisation's International Classification of Diseases. In a report published in 2000, the WHO said: Obesity is a chronic disease, prevalent in both developed and developing countries, and affecting children as well as adults.
Obesity has become a major problem for health clinics in the last decades of the 20th century and 21st century Taylor (1991). Obesity is measured using the body mass index (BMI) which is a simple index of weight for height that is being used to categorise adults into underweight, overweight and obese categories. It's calculated by dividing an individual's weight in kilograms by the square of their height in meters (kg/m2) Gereva (1999).