Question

A (an) _______ in the solute concentration of urine will deepen its color.

Answer 1

The principle factor responsible for the colour of urine is Urochrome or Urobilin, a breakdown product of heme. If water consumption is less, most of the water is reabsorbed through an elegant system of counter-current multiplier systems in Loop of Henle and Aquaporin water channels in collecting ducts . The level of urochrome becomes concentrated because of low water level, and hence urine appears darker. In contrast, a low concentrated urine ,as it is observed when water intake is adequate, have much more of the solvent i.e.. water. High water level means the urochrome is diluted , and expectedly its color also lighten. Apart from Urochrome, several other factors can also affect color, such as different medicinal metabolites, some B-complex vitamins and beta carotene among others. Nevertheless, they all influence the urine color in the same way as urochrome. The more concentrated these pigments become, the deeper the color of urine will be.

Hence, An increase in the solute concentration of urine will deepen its color.