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.
An explicit rationale for labeling obesity a disease was found in only three instances. In two of these, the rationale presented is that obesity is a disease in the same sense that condition X (hypertension, hypercholesterolemia) is a disease Â¾ each is a risk factor for other diseases. However, this appeal to analogy is, at best, illustrative and not demonstrative.