Why is there noticeable swelling in the front part of the neck of a person who vhas goiter?

The noticeable swelling in the front of the neck of a person suffering from goiter is due to the inflammation of the thyroid gland. Also, antibodies secret in autoimmune disease attack the thyroid gland and result in the formation of goiter.

Further Explanation:

The thyroid gland is present below the muscles and skin at the anterior of the neck. This gland is brownish-red in color. It consists of right and left halves mainly called lobes. These lobes resemble the wings of a butterfly. It helps in regulating the development and growth of secondary organs. The thyroid hormones released by a thyroid gland are called tri-iodothyronine (T3) and thyroxine (T4). These hormones are passed in the bloodstream and help in maintaining the body’s metabolism.

The enlarged thyroid gland is called goiter. This can develop due to inflammation of the thyroid gland or when the thyroid gland is secreting too little or too much hormone. Goiter can result from other thyroid-related issues, like thyroid cancer, thyroid cyst or thyroid infection. Also, individuals who don't include an adequate level of iodine in their diet results in the formation of goiter.

Goiter can also result from autoimmune diseases. Graves' disease and Hashimoto's disease are autoimmune diseases. In these diseases, the body secretes proteins that are mainly called antibodies. These antibodies attack the thyroid gland and result in the formation of goiter.

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Answer Details:

Grade: Senior School

Subject: Biology

Chapter: Endocrine imbalance and diseases

Keywords:

Thyroid gland, goiter, grave’s’ disease, hashmito’s disease, thyroid cancer, swelling, antibodies, protein, hormone, thyroxine (T4) and tri-iodothyronine (T3).

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question - in 1827, john walker, a druggist in a small english town, tipped a splint with sulphur, chlorate of potash, and sulphid of antimony, and rubbed it on sandpaper, and it burst into flame. the druggist had discovered the first friction-chemical match, the kind we use to-day. it is called friction-chemical because it is made by mixing certain chemicals together and rubbing them. although walker's match did not require the bottle of acid, nevertheless it was not a good one. it could be lighted only by hard rubbing, and it sputtered and threw fire in all directions. in a few years, however, phosphorus was substituted on the tip for antimony, and the change worked wonders. the match could now be lighted with very little rubbing, and it was no longer necessary to have sandpaper upon which to rub it. it would ignite when rubbed on any dry surface, and there was no longer any sputtering. this was the phosphorus match, the match with which we are so familiar. according the paragraph what was the benefit of the new phosphorus match? it burst into flame when rubbed on sandpaper. it was made by mixing chemicals. it could be ignited on any dry surface. it threw fire in all directions.

answer - matches required natural chemicals