More images of melasma ... Melasma is more common in women than in men; only 1-in-4 to 1-in-20 affected individuals are male, depending on the population studied. It generally starts between the age of 20 and 40 years, but it can begin in childhood or not until middle age.
Which structure in the kidneysâ nephrons is mainly responsible for the filtration of the blood? A. collecting duct B. loop of Henle C. glomerulus D. Bowmanâs capsule.pecialized cells regulate the expression of genes because they A. do not want the genes to become worn out. B. cannot control the translation of proteins. C. do not carry the complete genetic code in their nuclei. D. do not need the proteins that are specified by certain genes.
The kidneys are bilateral bean shaped organs, located in the posterior abdomen. They are reddish-brown in colour. The main function of the kidneys is to filter and excrete waste products from the blood.They are also responsible for water and electrolyte balance in the body.Metabolic waste and excess electrolytes are excreted by the kidneys to form urine. Urine is transported from the kidneys to the bladder by the ureters.he kidneys lie retroperitoneally (behind the peritoneum) in the abdomen, either side of the vertebral column. The left and right kidneys are located at different vertebral levels: 1  Left kidney: T11- L2. 2  Right kidney: T12 â L3 (it is lower due to the presence of the liver).