Q.5. What is the significance of iodine in the:
a) Human diet.
b) Life cycle of frog

Dear student,     
Please find below the solution to the asked query                                                             

a. Iodine is present in salts that we take in our food. This is an essential trace element required for the production of thyroid hormone inside thyroid gland. This hormone controls various body processes and basal metabolic rate (BMR) of the body. In absence of iodine thyroid gland swollen and this condition is clinically known as ‘goitre’. Other problems associated with iodine deficiency include muscle weakness, fatigue, low temperature of the body etc. 

b. The hormone thyroxine is helpful in the metamorphosis of frog i.e conversion of a tadpole to frog which occurs during the life cycle of a frog. Thyroxine is produced with the help of iron. 

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