Why is the use of iodised salt advisable?
The use of iodised salt is advisable because iodine is necessary for the thyroid gland to make the thyroxin hormone. This hormone regulates carbohydrate, protein and fat metabolism in the body to provide the best balance for growth.
In case iodine is deficient in our diet, there is a possibility that we might suffer from goitre. One of the symptoms of this disease is a swollen neck. Therefore, consuming iodised salt ensures the proper synthesis of thyroxin and prevents such deficiency diseases.
Explanation
The answer is derived directly from the textbook context which establishes the link between iodine and thyroxin synthesis. The text explains that iodine is essential for the thyroid gland to produce thyroxin, which regulates metabolism for growth. Furthermore, the context highlights the consequence of iodine deficiency, specifically mentioning the disease 'goitre' and its symptom of a swollen neck. The answer strictly adheres to these facts without adding external information.
Solution Steps
Step 1: Identify the role of iodine from the text (essential for thyroid gland to make thyroxin).
Step 2: Identify the function of thyroxin (regulates carbohydrate, protein, and fat metabolism for growth).
Step 3: Identify the consequence of iodine deficiency (risk of goitre and swollen neck).
Step 4: Synthesize these points to explain why iodised salt is advised.