Question 1

A client with hypothyroidism is told by the health care provider that the thyroid-stimulating hormone level is elevated.The client says to the nurse,"I don't understand why my TSH is high.I thought I had low thyroid levels." The most appropriate response by the nurse is:

Accepted Answer

TSH is a hormone released by the pituitary gland that signals the thyroid gland to produce thyroid hormones. When the thyroid gland is unable to produce enough thyroid hormones, the pituitary gland increases the production of TSH to try and stimulate the thyroid gland to make more hormones. Therefore, an elevated TSH level indicates that the thyroid gland is not producing enough hormones and is a common finding in individuals with hypothyroidism. Option A is inappropriate as it is dismissive of the client's concerns and does not provide any useful information. Option C is incorrect as there are no other lab tests performed to see how the body tolerates low thyroid hormone levels. Option D is also incorrect as TSH is not a thyroid hormone but a hormone released by the pituitary gland.

Question 2

A child who is small-for-age is to receive supplemental injections of growth hormone.The mother of the client asks,"Why does my child have to take these shots? I read in the paper that hormones are dangerous." Which response by the nurse is most appropriate?

Accepted Answer

A

Question 3

The nurse is evaluating a client who is receiving a thyroid hormone supplement.The client's TSH level has gone down,and the T3 and T4 levels have increased.The nurse knows that:

Accepted Answer

A decrease in the TSH is desirable because it indicates that the thyroid gland is being adequately stimulated by the thyroid hormone supplement. This results in an increase in the production and circulation of T3 and T4 hormones. An increase in T3 and T4 levels is expected in response to thyroid hormone supplementation.

Question 4

When instructing an adolescent on the reproductive system,the nurse explains that which hormones interact to promote maturation of ovarian follicles and produce estrogen?
Select all that apply.

Accepted Answer

Follicle-stimulating hormone and gonadotropin-releasing hormone interact to promote maturation of ovarian follicles and produce estrogen. Adrenocorticotropic hormone, antidiuretic hormone, and growth hormone do not directly play a role in the reproductive system.

Question 5

The nurse notes that several clients prescribed supplemental thyroid hormone are all receiving different doses of the same drug.The nurse recognizes that this variation is mostly driven by:

Accepted Answer

The number and sensitivity of an individual client's tissue receptors for thyroid hormone can vary, leading to differences in the doses prescribed. Age, ethnicity, psychological status, acceptance of therapy, height, and weight are not the primary factors influencing the variation in doses.

Question 6

A client is diagnosed with a disorder of the pituitary gland.When reviewing this client's medical history,the nurse will identify which health problems as potential results of the pituitary disorder?
Select all that apply.

Accepted Answer

The pituitary gland regulates various hormones. Diabetes insipidus (A) is due to insufficient ADH from the pituitary. Acromegaly (B) results from excess growth hormone. Breast-feeding abnormalities (C) can occur due to prolactin issues. Graves disease (D) and Addison disease (E) are related to the thyroid and adrenal glands, respectively, not the pituitary.

Question 7

The nurse in an endocrinology practice is seeing a client with low growth hormone levels.The client's history reveals extensive pituitary damage secondary to a large adenoma.The nurse recognizes that the client's small stature results from:

Accepted Answer

The client's low growth hormone levels are likely due to damage to the pituitary gland, which produces and secretes GH. The lack of response to GH indicates a problem with the tissue receptors, rather than negative feedback or elevated ACTH levels.

Question 8

When a client's blood sugar drops too low,the pancreas refrains from releasing insulin.The nurse caring for the client recognizes that the drop in insulin production is a result of:

Accepted Answer

This scenario involves negative feedback. Negative feedback occurs when a change in a system results in a response that opposes or reverses the initial change. In this case, the drop in blood sugar triggers the pancreas to stop releasing insulin, which helps to prevent the blood sugar from dropping further. This is an example of negative feedback because the response of the pancreas opposes or reverses the initial change in blood sugar. Up-regulation and down-regulation refer to changes in the number or sensitivity of receptors on a cell, and positive feedback leads to an amplification of a response rather than a reversal.

Question 9

The nurse is caring for a client with hypocalcemia.In planning to meet the client's needs,the nurse would expect which alteration?

Accepted Answer

An increased level of parathyroid hormone is expected in response to hypocalcemia. The parathyroid hormone is released to increase calcium levels in the blood by stimulating the release of calcium from bones, increasing calcium absorption in the intestines, and reducing calcium excretion in the urine.

Question 10

The nurse is checking lab work on a client's record.The client's FSH and LH levels are low.The nurse suspects this client may have health problems related to:

Accepted Answer

FSH (follicle-stimulating hormone) and LH (luteinizing hormone) are both hormones that play important roles in the reproductive system. Low levels of these hormones can indicate issues with fertility, menstrual abnormalities, or other reproductive health problems.

Question 11

A client who is acutely ill is having difficulty maintaining a steady blood pressure.The nurse recognizes that when the client's blood pressure drops,the hormonal mechanism that immediately takes action is:

Accepted Answer

When the blood pressure drops, the hormonal mechanism that immediately takes action is the release of epinephrine by the adrenal medulla. Epinephrine triggers vasoconstriction, which increases peripheral resistance and raises blood pressure. This mechanism is part of the body's fight or flight response and is activated in response to stress. Aldosterone is released by the adrenal cortex to help conserve sodium and water, not increase blood pressure. Cortisol is released by the adrenal cortex in response to stress, but its primary function is to raise blood sugar, not blood pressure. Insulin is released by the pancreas in response to high blood sugar levels, which has no direct effect on blood pressure.

Question 12

The nurse is assisting a postpartum client who is new to breastfeeding.The nurse knows the production of breast milk is dependent on which hormonal mechanism?

Accepted Answer

Prolactin, a hormone produced by the pituitary gland, stimulates milk production by binding to receptors on the breast secretory cells. This hormonal mechanism is responsible for the production of breast milk in lactating women.

Question 13

A client with a pituitary defect is being treated for Addison disease with supplemental corticosteroids.The client develops signs and symptoms of Cushing syndrome.The nurse recognizes that this reaction is a result of the failure of normal:

Accepted Answer

The development of Cushing syndrome in a client with Addison disease who is being treated with corticosteroids indicates that the feedback mechanism between the hypothalamus, pituitary gland, and adrenal glands has failed, causing an excess of corticosteroids in the body. In a normal functioning system, when the body has enough corticosteroids, the hypothalamus and pituitary gland will stop producing and secreting adrenocorticotropic hormone (ACTH), which stimulates the production of corticosteroids by the adrenal glands. However, in a client with a pituitary defect, this feedback mechanism may not work properly, leading to excessive amounts of corticosteroids in the body and the development of Cushing syndrome.

Question 14

A client with an exacerbation of COPD is receiving steroid therapy in tapering doses.The nurse recognizes that this approach is medically appropriate because it applies what principle of up-regulation?

Accepted Answer

Up-regulation requires time for regrowth of cell-wall hormone receptors. Tapering doses of steroids allow for the body to slowly adjust to the decrease in steroid levels and up-regulate cell-wall hormone receptors over time. This allows the body to maintain a balance without abruptly stopping steroid therapy. Option A is incorrect because up-regulation increases the sensitivity of the cell-wall hormone receptors, not decreases. Option B is incorrect because up-regulation increases the number of receptors on the cell-wall surface, not decreases. Option D is incorrect because up-regulation does not change the configuration of cell-wall hormone receptors, but it does increase their sensitivity and number.

Question 15

A client with hyperthyroidism has been reading about PTU on the internet.The client asks the nurse,"How do antihormones work to help my condition?" Which is the nurse's best response?

Accepted Answer

PTU is a drug that works by blocking the body's response to thyroid hormone. In hyperthyroidism, the body produces too much thyroid hormone, leading to symptoms such as weight loss, sweating, rapid heartbeat, and anxiety. PTU helps to control these symptoms by reducing the amount of thyroid hormone produced by the body. It does not regenerate the thyroid gland or replace abnormal thyroid hormone with normal thyroid hormone.

Question 16

The nurse is caring for a client who had been receiving supplemental cortisone.The client developed a bleeding ulcer,and the steroid was discontinued.The bleeding has stopped but the blood pressure remains unstable.The nurse recognizes that the unstable blood pressure is related to:

Accepted Answer

The unstable blood pressure is related to down-regulation of corticosteroid receptors. When the body is exposed to high levels of cortisone (a corticosteroid) for a prolonged period, it may decrease the number of corticosteroid receptors as a way to reduce sensitivity to the hormone. Once the supplemental cortisone is discontinued, the body's reduced number of receptors may struggle to respond adequately to the body's own corticosteroids, potentially leading to issues such as unstable blood pressure.

Question 17

The nurse is administering testosterone to a client with breast cancer.The nurse recognizes that this therapy is part of the client's treatment plan because:

Accepted Answer

Testosterone can block the growth of estrogen-sensitive cancers, including some types of breast cancer, by competing with estrogen for binding sites on cancer cells. This can reduce the amount of estrogen available to stimulate tumor growth.

Question 18

The nurse is administering hormones to several clients.The nurse recognizes that which medication order represents exaggerated response therapy?

Accepted Answer

Exaggerated response therapy involves administering hormones at higher than normal doses in order to suppress or control an overactive hormone system. Corticosteroids are often used in this way for clients with conditions such as lupus. Insulin, vasopressin, and thyroid hormone are not typically used in exaggerated response therapy.

Question 19

The nurse is caring for a client with hyperglycemia.When choosing nursing interventions,the nurse is aware that a high serum blood sugar produces changes in the client's pancreas that are consistent with a:

Accepted Answer

Hyperglycemia produces a humoral stimulus in the pancreas, leading to the release of insulin, which helps lower blood sugar levels.

Question 20

While reviewing a medical record,the nurse notes that a client's ACTH levels are low.The nurse knows this deficit will primarily impact the client's level of:

Accepted Answer

ACTH (Adrenocorticotropic hormone) stimulates the adrenal gland to produce corticosteroids such as cortisol. Low levels of ACTH will result in low levels of corticosteroids, which are essential for regulating metabolism, immune response, stress response, and blood pressure. Low levels of ACTH may lead to conditions such as Addison's disease, which is characterized by deficiency of corticosteroids.

Quiz 64: Review of the Endocrine System