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.
Making the world better, one answer at a time. It is the nephron, the basic structural and functional unit of the kidneys. Its main job is to regulate waste and filter the blood and excrete toxins via urine. the microscopic tube where urine is formed is called the nephron.They are located in the kidneys.renal tubules. It's a complex answer.ts main job is to regulate waste and filter the blood and excrete toxins via urine. the microscopic tube where urine is formed is called the nephron. They are located in the kidneys. renal tubules. It's a complex answer.