Urea and electrolytes are both found in the urine. Urea excretion is part of the body's' waste management system while electrolyte excretion is how the body regulates various chemical levels in the blood. The amount of both substances can help tell a doctor how well the body is functioning and whether a pathology might be present.
Electrolytes
Electrolytes are minerals which, when dissolved in water, are capable of carrying an electrical charge. Such minerals can exist in foods as salts, and commonly include sodium chloride and potassium chloride. When foods containing the minerals are digested, the minerals dissociate into their elemental forms, such as sodium and chloride ions. These ions carry the electrical charge that is crucial to the function of every cell. Electrolytes are important in such processes as regulating water balance, producing energy and nerve impulse transmission.
Urea
Urea is a chemical waste product that results from the breakdown of protein. Under normal conditions, it is released by cells and travels in the bloodstream to the kidneys. The kidneys then excrete urea in the urine. High levels of urea in the urine, called uremia, may indicate that the kidneys are not functioning properly. It can also mean that the body is dehydrated, which often appears as more brightly yellow-colored urine.
Kidney Function
The kidneys are designed to remove waste products from the blood such as urea and creatinine, which is a muscle waste product. The kidneys are responsible for controlling the levels of electrolytes in the body. The kidneys can sense electrolyte levels and make adjustments. If electrolyte levels are too low, the kidneys can lessen the amount of individual electrolytes excreted. If electrolyte levels are too high, the kidneys can accelerate their excretion.
Urinalysis
A urinalysis is a common laboratory test. It measures the amounts of various chemicals in the urine. The relative levels of each chemical can provide insight into different kinds of physiological functions. For example, abnormal levels of electrolytes can indicate a metabolic problem or a pathology in the kidneys. Abnormally high levels of urea can indicate the kidneys are not working properly. Some medicines can cause kidney damage, so monitoring kidney function by urinalysis can be an important way to regulate the medicine.
