A nurse is reinforcing teaching with a client who is scheduled for a blood test to measure her thyroid stimulating hormone (TSH) level. Which of the following statements should the nurse give?

“This test detects antithyroid antibodies in your blood.”

“This test measures the amount of thyroid hormone that ataches to a protein in your blood.”

“This test determines whether your thyroid gland is overactive, appropriately active, or underactive.”

“This test measures the absorption of iodine and how it relates to the thyroid gland.”

Answer and Explanation

The Correct Answer is C

Choice A reason: This test does not detect antithyroid antibodies in your blood. Antithyroid antibodies are proteins that atack the thyroid gland and can cause autoimmune thyroid diseases, such as Hashimoto’s thyroiditis or Graves’ disease. To detect antithyroid antibodies, you need a diﬀerent blood test called the thyroid peroxidase (TPO) antibody test.

Choice B reason: This test does not measure the amount of thyroid hormone that ataches to a protein in your blood. Thyroid hormone can exist in two forms in the blood: free or bound. Free thyroid hormone is not atached to any protein and can enter the cells and tissues where it is needed. Bound thyroid hormone is atached to a protein called thyroxine-binding globulin (TBG) and cannot enter the cells and tissues. To measure the amount of thyroid hormone that ataches to TBG, you need a diﬀerent blood test called the total thyroxine (T4) test.

Choice C reason: This test determines whether your thyroid gland is overactive, appropriately active, or underactive. TSH is a hormone produced by the pituitary gland that stimulates the thyroid gland to make and release thyroid hormones, such as thyroxine (T4) and triiodothyronine (T3). These hormones regulate many body functions, such as metabolism, growth, and development. The TSH test measures the amount of TSH in the blood and reﬂects how well the thyroid gland is working. If the TSH level is high, it means that the thyroid gland is underactive (hypothyroidism) and not making enough thyroid hormones. If the TSH level is low, it means that the thyroid gland is overactive (hyperthyroidism) and making too much thyroid hormones.

Choice D reason: This test does not measure the absorption of iodine and how it relates to the thyroid gland. Iodine is a mineral that is essential for the production of thyroid hormones. The thyroid gland absorbs iodine from the food and water we consume and uses it to make T4 and T3. To measure the absorption of iodine by the thyroid gland, you need a diﬀerent test called the radioactive iodine uptake (RAIU) test.

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Correct Answer is C

Explanation

Choice A: Thyroxine (T4) level. This is incorrect because T4 is one of the thyroid hormones that is increased in hyperthyroidism. T4 is produced by the thyroid gland and converted to T3 in the tissues. A high level of T4 indicates overactivity of the thyroid gland.1

Choice B: Triiodothyronine (T3) level. This is incorrect because T3 is another thyroid hormone that is increased in hyperthyroidism. T3 is the more active form of thyroid hormone and regulates the metabolism of cells. A high level of T3 indicates overactivity of the thyroid gland.1

Choice C: Thyroid stimulating hormone (TSH) level. This is correct because TSH is a hormone that stimulates the thyroid gland to produce T4 and T3. TSH is produced by the pituitary gland and regulated by a feedback mechanism. When the levels of T4 and T3 are high, the pituitary gland reduces the secretion of TSH to inhibit further production of thyroid hormones. Therefore, a low level of TSH indicates hyperthyroidism.1

Choice D: Glucose level. This is incorrect because glucose level is not directly related to thyroid function. However, hyperthyroidism can aﬀect glucose metabolism and cause increased blood sugar levels due to increased breakdown of glycogen and glucose uptake by cells. Therefore, glucose level may be elevated in some cases of hyperthyroidism, but it is not a specific indicator.

A. “My breath may have a fruity odor.” B. “My appetite will be decreased.” C. “I will be more thirsty than usual.” D. “I might experience blurry vision at times.”

Correct Answer is A

Explanation

Choice A reason: A fruity odor in the breath is a symptom of hyperglycemia, especially when it is severe and causes ketoacidosis. Ketoacidosis is a condition where the body produces ketones, which are acidic substances that result from the breakdown of fat for energy when there is not enough insulin or glucose available. Ketones can make the breath smell fruity or like nail polish remover.

Choice B reason: A decreased appetite is not a symptom of hyperglycemia. On the contrary, an increased appetite or hunger is a symptom of hyperglycemia, as the body tries to compensate for the lack of glucose in the cells by stimulating the hunger center in the brain.

Choice C reason: An increased thirst is a symptom of hyperglycemia, as the body tries to ﬂush out the excess glucose and ketones in the blood through urine. This leads to dehydration and thirst signals in the brain.

Choice D reason: A blurry vision at times is a symptom of hyperglycemia, as high blood glucose levels can cause swelling and damage to the lens of the eye, aﬀecting its ability to focus light properly. This can lead to temporary or permanent vision problems.

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A nurse is reinforcing teaching with a client who is scheduled for a blood test to measure her thyroid stimulating hormone (TSH) level. Which of the following statements should the nurse give?

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Naxlex Comprehensive Predictor Exams

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Correct Answer is C

Explanation

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Correct Answer is A

Explanation

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