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A test that can assess the thyroid function by determining the amount of iodine taken into thyroid cells is known by the abbreviation of RAIU or the Radio Active Iodine Uptake Test. The RAIU is used in diagnosis of thyroid problems.
This is extremely vague, but assuming this is regarding concentration gradient in the nervous system, the Sodium-Potassium pump is responsible for transporting sodium and potassium.
Answer:
By increasing the enzyme concentration, the maximum reaction rate greatly increases. Conclusions: The rate of a chemical reaction increases as the substrate concentration increases. Enzymes can greatly speed up the rate of a reaction.