ANATOMY

Detailed explanation-1: -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-2: -Filtration involves the transfer of soluble components, such as water and waste, from the blood into the glomerulus. Reabsorption involves the absorption of molecules, ions, and water that are necessary for the body to maintain homeostasis from the glomerular filtrate back into the blood.

Detailed explanation-3: -Namely filtration, reabsorption, secretion, and excretion. Reabsorption in the nephron may be either a passive or active process, and the specific permeability of the each part of the nephron varies considerably in terms of the amount and type of substance reabsorbed.

Detailed explanation-4: -Reabsorption in the early proximal convoluted tubule: The most essential substances in the filtrate are reabsorbed in the first half of the proximal convoluted tubule (early proximal tubule).

Detailed explanation-5: -The kidneys filter unwanted substances from the blood and produce urine to excrete them. There are 3 main steps of urine formation: Glomerular filtration, Reabsorption Secretion. These processes ensure that only waste and excess water are removed from the body.