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.
In producing urine, the kidneys excrete wastes such as urea and ammonium; the kidneys also are responsible for the reabsorption of water, glucose, and amino acids. The kidneys also produce hormones including calcitriol, renin, and erythropoietin. http://wiki.answers.com/What_is_a_function_of_the_kidney#ixzz18hXtaIK4.rine flows from the kidneys to the bladder through t â¦ he ureters.   the main function unit of the kidney is the nephron   The kidneys regulate the body's fluid volume, mineral composition and acidity by excreting and reabsorbing water and inorganic electrolytes.