AP BIOLOGY

Detailed explanation-1: -The kidneys are the part of our excretory system. It plays an important role by filtering blood and removing urea, excess salt and water from the body as urine. Q.

Detailed explanation-2: -The filtrate absorbed in the glomerulus flows through the renal tubule, where nutrients and water are reabsorbed into capillaries. At the same time, waste ions and hydrogen ions pass from the capillaries into the renal tubule. This process is called secretion.

Detailed explanation-3: -The majority of water reabsorption that occurs in the nephron is facilitated by the AQPs. Most of the fluid that is filtered at the glomerulus is then reabsorbed in the proximal tubule and the descending limb of the loop of Henle.

Detailed explanation-4: -The proximal tubule of the nephron-This is the correct answer. Secretion occurs in the proximal tubule section of the nephron and is responsible for the transport of certain molecules out of the blood and into the urine.