Urine
- Urine produced by the kidneys contains a mixture of
- Urea
- Excess mineral ions
- Excess water
- The colour and quantity of urine produced in the body can change quickly
- Large quantities of urine are usually pale yellow in colour because it contains a lot of water and so the urea is less concentrated
- Small quantities of urine are usually darker yellow / orange in colour because it contains little water and so the urea is more concentrated
- There are various reasons why the concentration of urine will change, including:
- Water intake - the more fluids drunk, the more water will be removed from the body and so a large quantity of pale yellow, dilute urine will be produced
- Temperature - the higher the temperature the more water is lost in sweat and so less will appear in the urine, meaning a smaller quantity of dark yellow, concentrated urine will be produced
- Exercise - the greater the level of exercise, the more water is lost in sweat and so less will appear in the urine, meaning a smaller quantity of dark yellow, concentrated urine will be produced
