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The Thyroid Gland

Which gland r...

Question

Which gland requires iodine to function properly?

A

Parathyroids

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B

Pancreas

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C

Thyroid

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D

Ovaries and testes

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Solution

The correct option is C
Thyroid

Thyroid gland requires iodine for its proper functioning. The synthesis of thyroxine is obstructed in the absence of iodine. When the thyroid gland has insufficient amounts of iodine, the gland enlarges and results in a disease called goitre. Hence, iodized salt is used to ensure that people take in adequate amounts of iodine in their diet.

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Q. The dramatic changes in body features associated with puberty are mainly because of the secretions of :
(a) estrogen from testes and testosterone from ovary
(b) estrogen from adrenal gland and testosterone from pituitary gland
(c) testosterone from testes and estrogen from ovary
(d) testosterone from thyroid gland and estrogen from pituitary gland

Q. (a) Name the hormones secreted by the following endocrine glands :
(i) Thyroid gland
(ii) Parathyroid glands
(iii) Pancreas
(iv) Adrenal glands
(b) Write the functions of testosterone and oestrogen hormones.

Q. One of the following statements is not true about thyroxine. This is :
(a) Thyroid gland requires iron to synthesise thyroxine
(b) It regulates carbohydrate, protein and fat metabolism
(c) Iodine is essential for the synthesis of thyroxine
(d) Thyroid gland can enlarge due to lack of thyroxine

Which gland requires iodine to function properly?

Q. Pituitary, thyroid, adrenal, pancreas, testes and ovary. From the glands listed above one gland acts both as exocrine and endocrine. Name it.

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