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Answers
Answer:
a. Thyroid Gland
b. The thyroid gland secretes three hormones- thyroxine, triiodothyronine and calcitonin.
c. Thyroid is stimulated to secrete its hormones by thyrotropin, hormone from anterior pituitary.
d. Thyroxine and triiodothyronine are iodinated forms of amino acid tyrosine. They are stored in the colloids that fill the follicles and are released to the blood when needed. The stored hormones are enough to supply a person for upto 10 months. Thyroxine controls the general metabolism for regulating the rate of oxidation and production of energy. They maintain the basal metabolic rate of body.. They promote growth of body tissues and development of mental faculties.
e. yperthyroidism is a condition caused by hypersecretion of thyroid hormones. A goitre is an example of hyperthyroidism where there is enlargement of the thyroid gland. Goitre is sometimes a side effect of hyperthyroidism. This is due to an over-stimulated thyroid and inflamed tissues.
Hence, the disease caused due to hypersecretion of the thyroxine is goitre.