Final answer:
The correct order of fluid flow in the urinary system is proximal convoluted tubule, nephron loop, distal convoluted tubule, collecting duct, calyces, renal pelvis, and ureters, with regulated reabsorption of water and solutes occurring along the pathway.
Step-by-step explanation:
The correct order of fluid flow through the urinary system is: proximal convoluted tubule (PCT), nephron loop (descending and ascending loops of Henle), distal convoluted tubule (DCT), collecting duct, calyces, renal pelvis, and finally the ureters. This is the pathway the filtrate takes after being formed in the glomerulus, through to the point where it exits the kidneys as urine.
Throughout this process, water and solutes are reabsorbed into the bloodstream, and this reabsorption is regulated by hormones such as ADH and aldosterone. Specifically, water reabsorption occurs at the PCT, loop of Henle, DCT, and the collecting ducts. Approximately 10 percent of the water reaches the collecting ducts, where ADH can significantly influence the amount of water reabsorbed, based on the body's hydration status.