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.
SonyaM June 8, 2012 Posts, The Renal System 5 Comments. Each of our kidneys contains over a million nephrons. They are the functioning unit of the kidneys. They remove waste from the body and produces urine. Each nephron is made up of two parts: a renal corpuscle and renal tubules (Figure 1).Figure 1. Schematic diagram of the nephron demonstrating the site of action of diuretics. Source: PostGraduate Medical Journal. This is the head of the nephron and it is where urine first forms. 2  It consists of the glomerulus, which is surrounded by the Bowmanâs capsule (figure 2). 3  The glomerulus is like a network of capillaries.