A hormone called TSH is secreted by anterior pituitary gland and acts on the thy

Question

A hormone called TSH is secreted by anterior pituitary gland and acts on the thyroid gland To increase the secretion of thyroid hormone. Thyroid hormones on the other hand, have a Negative- feed back effect on TSH secretion. For a Pearson having normal function the rate At which TSH and the hormone are secreted remains with a normal range of concentration. However, In some people the immune system begins to produce an abnormal substance that functions like TSH. Predict what that substance will do to the rate of thyroid stimulating hormone secretion and the rate Of the thyroid hormone secretion. A hormone called TSH is secreted by anterior pituitary gland and acts on the thyroid gland To increase the secretion of thyroid hormone. Thyroid hormones on the other hand, have a Negative- feed back effect on TSH secretion. For a Pearson having normal function the rate At which TSH and the hormone are secreted remains with a normal range of concentration. However, In some people the immune system begins to produce an abnormal substance that functions like TSH. Predict what that substance will do to the rate of thyroid stimulating hormone secretion and the rate Of the thyroid hormone secretion. To increase the secretion of thyroid hormone. Thyroid hormones on the other hand, have a Negative- feed back effect on TSH secretion. For a Pearson having normal function the rate At which TSH and the hormone are secreted remains with a normal range of concentration. However, In some people the immune system begins to produce an abnormal substance that functions like TSH. Predict what that substance will do to the rate of thyroid stimulating hormone secretion and the rate Of the thyroid hormone secretion.

Explanation / Answer

If the person's immune system produces an abnormal hormone that mimics TSH (thyroid stimulating hormone), it acts on the thyroid hormone and stimulates the production of thyroid hormones, Thus, the thyroid hormone levels increase. Although the negative feedback loop inhibits the production of TSH, this loop can't prevent the abnormal hormone that is mimicking the functions of TSH, So, the thyroid hormone levels increase uncontrollably.

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