(a) How does chemical coordination take place in human beings?
(b) Why is the use of iodised salt advisable?

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Solution

(a) Chemical coordination takes place through hormones in human beings. Hormones instruct the brain when to pace up or slow down a particular function.
(b) Iodised salt contains iodine which is essential for making thyroxine by the thyroid gland.

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Question 2
Why is the use of iodised salt advisable?

Explain why, people are advised to use iodised salt in cooking food.

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