Biology
12th Edition
ISBN: 9780134813448
Author: Audesirk, Teresa, Gerald, Byers, Bruce E.
Publisher: Pearson,
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Chapter 38.3, Problem 1TC
A common test of thyroid gland function is to measure the amount of thyroid-stimulating hormone circulating in the blood. What would you hypothesize is wrong in a person who has an abnormally high level of TSH?
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Students have asked these similar questions
A common test of thyroid gland function is to measure the amount of thyroid-stimulating hormone circulating in the blood. What would you hypothesize is wrong in a person who has an abnormally high level of TSH?
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.
Thyroid cancer results when the cells in the thyroid gland divide uncontrollably. Individuals who have excessive exposure to radiation may have higher chance of getting thyroid cancer. Thyroid cancer can be treated through surgery, iodine therapy, radiotherapy, and/or chemotherapy. What is the purpose of prescribing thyroxine medication for patients following the surgical removal of the thyroid gland?
Select one:
a. to decrease TRH and increase TSH levels
b. to increase TRH and TSH levels
c. to decrease TRH and TSH levels
d. to increase TRH and decrease TSH levels
Chapter 38 Solutions
Biology
Ch. 38.1 - describe the four methods of communication between...Ch. 38.1 - Prob. 2CYLCh. 38.1 - Prob. 3CYLCh. 38.2 - Insulin is a large, water-soluble hormone that...Ch. 38.2 - Prob. 1CYLCh. 38.2 - Prob. 2CYLCh. 38.2 - explain the processes of negative and positive...Ch. 38.3 - A common test of thyroid gland function is to...Ch. 38.3 - Prob. 2TCCh. 38.3 - Prob. 3TC
Ch. 38.3 - Prob. 1HYEWCh. 38.3 - Endocrine disruptors have most frequently been...Ch. 38.3 - Prob. 1CYLCh. 38.3 - explain how negative feedback regulates the...Ch. 38.3 - Prob. 5TCCh. 38 - Prob. 1MCCh. 38 - Prob. 2MCCh. 38 - Steroid hormones include a. testosterone. b....Ch. 38 - Prob. 4MCCh. 38 - Prob. 5MCCh. 38 - Prob. 1FIBCh. 38 - Most endocrine hormones fall into three chemical...Ch. 38 - Prob. 3FIBCh. 38 - Prob. 4FIBCh. 38 - The pancreas releases the hormone _________ when...Ch. 38 - Prob. 6FIBCh. 38 - The adrenal cortex releases three major types of...Ch. 38 - Which chemical class of hormones usually attaches...Ch. 38 - Prob. 2RQCh. 38 - Prob. 3RQCh. 38 - Prob. 4RQCh. 38 - Prob. 5RQCh. 38 - Prob. 6RQCh. 38 - A student rescan, her decides to perform an...Ch. 38 - Prob. 2AC
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- Which is a result of consuming a diet deficient in iodine? Group of answer choices low plasma concentration of thyroid hormones due to reduced secretion of thyroid-stimulating hormone (TSH) by the pituitary gland low plasma concentration of thyroid hormones and an enlarged thyroid gland high plasma concentration of thyroid-stimulating hormone (TSH) due to a deficiency of thyrotropin-releasing hormone (TRH) high plasma concentration of thyroid hormones due to increased secretion of TSH by the pituitary gland low plasma concentration of thyroid hormones and atrophy of the thyroid gland due to reduced concentrations of thyroid-stimulating hormone (TSH)arrow_forwardAnother general principle of physiology is that structure is a determinant of—and has coevolved with—function. The structure of the thyroid gland is very unlike other endocrine glands. How is the structure of this gland related to its function?arrow_forwardHow would it be possible to have the normal amount of a hormone circulating in the blood yet have symptoms that indicate a shortage of that hormone? Give an example.arrow_forward
- Which cells in the thyroid gland produce calcitonin? which mineral is regulated by calcitonin? List three processes in the body in which this mineral is involved.arrow_forward1) Hormone pathologies often manifest with elevated or lower hormones. The underlying cause may differ. What symptoms would be associated with hyperthyroidism? 2) Autoimmune disease in which auto-antibodies stimulate the TSH receptor (TSHR) on the thyroid gland. How would this affect levels of TRH, TSH, and TH? Draw out the H-P-T axis to illustrate changes in each hormone. 3) What symptoms would be associated with hypothyroidism? 4) How could this disease be treated? When the thyroid cells are destroyed, they cannot make hormones anymore and TH replacement needs to be given.arrow_forwardConsider the communication between the hypothalamus, pituitary and various target organs when answering this question. For each condition discussed, state the change you would expect to find for each hormone/compound addressed - INCREASED, DECREASED, UNAFFECTED, CAN'T INTERPRET: A patient suffering from untreated Graves disease: A) TSH B) Calcitonin C) Thyroxine(T4/T3) D) TRH A patient suffering from untreated goiter: A) TSH B) Calcitonin C) Thyroxine(T4/T3) D) TRH A patient suffering from pituitary tumor secreting ACTH: A) CRH B) ACTH C) Cortisol D) Plasma potassium level Now, let's consider calcium metabolism and balance. For each condition discussed, state the change you would expect to find for hormone/calcium levels - INCREASED, DECREASED, UNAFFECTED, CAN'T INTERPRET: A patient with…arrow_forward
- Take thyroid hormones as an example of hormones and their properties. Thyroid hormone is highly bound to proteins in the blood. What is the benefit of such protein binding? What effect does protein binding have on the activity of the hormone? Name a gland other than the thyroid gland that is involved in regulating thyroid hormone production?arrow_forwardWhich of the following statements best describes diseases of the thyroid gland? Hyperthyroidism is associated with increased metabolism driven by increased sympathetic nervous drive. Children with cretinism have elevated levels of thyroid hormones and catecholamine-induced tachycardia. Hashimoto’s disease is more common in men than women and is associated with a goitre and unexplained weight gain. Grave’s disease is associated with overproduction of antibodies that cause the destruction of the thyroid gland.arrow_forwardHypothyroidism is a condition in which the thyroid gland fails to produce adequate amounts crucial hormones. In the early stages, persons suffering from this condition may be asymptomatic. However, chronic hypothyroidism may show signs of paleness. Please explain the physiological reasons for this symptomatology.arrow_forward
- Thyroid hormones are important in regulating the body’s basal metabolic rate. Thyroid hormones are lipid-soluble and have a long half-life.What are the advantages and disadvantages of a long half-life for thyroidhormones, compared with a short half-life?arrow_forwardDescribe the two primary factors that affect the concentration level of a circulating hormone.arrow_forwardGraves disease is a type of hyperthyroidism that results in an overactive thyroid. Bloodwork results indicating hyperthyroidism would show elevated amounts of which hormones? V A) T4 (thyroid hormone) B) TSH C) TRHarrow_forward
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