Question

List two factors on which reabsorption of water from urine depends.

Answer 1

Reabsorption of water:

1. Reabsorption is a process by which the nephron removes water and solutes from the filtrate and returns them to the bloodstream.
2. The glomerulus functions by filtering water and small solutes out of the bloodstream. The resulting filtrate contains waste and other substances like essential ions, glucose, amino acids, and smaller proteins.
3. After exiting the glomerulus, the filtrate flows into a duct in the nephron called the renal tubule. As it moves, the needed substances and some water molecules are reabsorbed through the tube wall into adjacent capillaries.
4. Reabsorption is a finely tuned process that is essential to maintain homeostasis of blood volume, blood pressure, plasma osmolarity, and blood pH.

Reabsorption of water depends upon the following factors:

1. The level of dissolved nitrogenous waste - The unwanted dissolved waste should be excreted out of the body. Otherwise, it may cause harm or disease in the body.
2. The amount of water present in the body - Excess water may cause harm to the body.