Human Anatomy (9th Edition)
Human Anatomy (9th Edition)
9th Edition
ISBN: 9780134320762
Author: Frederic H. Martini, Robert B. Tallitsch, Judi L. Nath
Publisher: PEARSON
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Chapter 19, Problem 3CT
Summary Introduction

To review:

The reasons for hypothyroidism caused by the problems at the level of pituitary, hypothalamus, and thyroid gland.

Introduction:

The primary function serve by the thyroid gland include the secretion of the TH (thyroid hormone). When the level of the TH decreases in the blood, it causes various metabolic changes. This condition is known as hypothyroidism. This condition can be explained by different physiological changes in the body.

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In Graves' disease, the body attacks the thyroid gland tissue and causes it to overproduce thyroid hormones, resulting in elevated blood levels of  T3 and T4.  Which of the following statements would be TRUE? Since blood levels of thyroid hormones are elevated, the hypothalamus would not release TRH and the Anterior Pituitary Gland would release more TSH. Since blood levels of thyroid hormones are elevated, the hypothalamus would release more TRH and the Anterior Pituitary Gland would then stop releasing TSH.  Since blood levels of thyroid hormones are elevated, the hypothalamus would not release TRH and the Anterior Pituitary Gland would not release TSH. Since blood levels of thyroid hormones are elevated, the hypothalamus would not release TSH and the Anterior Pituitary Gland would not release TRH.
The endocrine system is composed of glands that secrete hormones that regulate the activity of different body cells. The pituitary gland is often called the "master gland" because it controls the activities of other glands. Discuss a disorder associated with either hypo or hypersecretion of a specific hormone secreted by the pituitary gland. Include in your discussion the answer to the following: What effect will an increase or decrease in production have on the target organs?What signs and symptoms are associated with this condition and how is it treated?
Which one of the following statements about T3 is FALSE? 1)  It is thought to be the most active thyroid hormone. 2)  It may be elevated to a greater extent than T4 in hyperthyroidism. 3)  It is not bound to serum proteins. 4)  It is commonly decreased in patients with nonthyroidal illness. no references, just homework.
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