Chapter 25.4, Problem 32LC

Interpretation Introduction

Interpretation: To discuss the steps that occur when iodine-131 is used to treat thyroid disorders.

Concept Introduction: Radioisotopes serve some important functions such as analyzing the matter, studying plant growth, and diagnosing medical problems.

Answer to Problem 32LC

The three steps that are involved in treating thyroid disorders are discussed briefly.

1. The thyroid gland extracts iodide ions from the blood and this is used in making a hormone called thyroxine.
2. To diagnose thyroid disorders, a person is given a drink that contains a small amount of radioisotope i.e., iodine-131.
3. After some time, by scanning a person’s throat, the amount of iodide taken up is measured.

Explanation of Solution

In medicines, the radioisotope function as follows:

1. Radioisotopes are used in detecting the disorders in the thyroid gland that is present in the throat. The radioisotope that is used is iodine-131.
2. The radioisotope named technetium-99 is used to detect brain tumors as well as liver disorders.

The steps that are involved in treating thyroid disorders are as follows:

1. The thyroid gland extracts iodide ions from the blood and this is used in making a hormone called thyroxine.
2. To diagnose thyroid disorders, a person is given a drink that contains a small amount of radioisotope i.e., iodine-131.
3. After some time, by scanning a person’s throat, the amount of iodide taken up is measured.

Conclusion

Thus, radioisotope i.e., iodine-131 is used in detecting thyroid disorders in the body.