The yellow colour of urine is due to the presence of

Question

Question

This question was previously asked in

Territorial Army Official Paper II (Conducted on 31 Jul 2016)

Answer 1

The correct answer is Urobilin or Urochrome.

Key Points

Normal urine colour ranges from pale yellow to deep amber
Pigments and other compounds in certain foods and medications can change your urine colour.
Additional Information

During summer when the surrounding temperature is high, we lose water in the form of sweat.
Hence kidneys retain water for maintaining the fluidity of the blood and less urine is formed.
But during winter, the surrounding temperature will be very low.
There will not be any sweating, no evaporation losses.
Moreover, to keep the body temperature constant, the blood capillaries in the skin get constricted and the blood pressure is increased.
The result is that our body gets warmed up.
In order to maintain the blood pressure normal, the excess water along with the wastes is excreted mostly in the form of urine.
This is the reason for more urine output and frequent urination under very cool conditions and in winter.