During a low dose (1 mg) dexamethasone suppression test, total cortisol levels measured in a patient in a patient at 8:35 am was 2.8ug/dL How is that interpreted? Answers to choose from: The patient is normal, or The patient has Cushing's syndrome, or The patient has a nonpituitary tumor causing ectopic ACTH syndrome., or The patient has an ACTH-screting pituitary adenoma.

During a low dose (1 mg) dexamethasone suppression test, total cortisol levels measured in a patient in a patient at 8:35 am was 2.8ug/dL How is that interpreted? Answers to choose from: The patient is normal, or The patient has Cushing's syndrome, or The patient has a nonpituitary tumor causing ectopic ACTH syndrome., or The patient has an ACTH-screting pituitary adenoma.

Body Structures & Functions

12th Edition

ISBN:9781285695495

Author:Scott

Publisher:Scott

Chapter11: Endocrine Systems

Section: Chapter Questions

Problem 1M

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A patient with Cushingâ s syndrome due to an adrenal tumor would have high plasma levels of CRH. True False 2. The normal response to a low dose (1 mg) dexamethasone suppression test is a reduction in plasma cortisol to less than ~5 microgram/dL. True False 3. ACTH stimulates the conversion of cholesterol to pregnenolone in cells of the adrenal cortex. True False
Cushing’s syndrome is a disorder that occurs when your adrenal glands release too much cortisol.Sometimes, Cushing’s is caused by a hormone-secreting tumor that leads to dysregulation of the hypothalamus-pituitary-adrenal gland axis. Below, are listed a few tests doctors perform to determine the specific cause of Cushing’s in each patient. Please read the description of the test and possible results and respond to the prompts below. 1 Measure blood levels of adrenocorticotropic hormone (ACTH). If ACTH levels are lower than normal, where is the tumor? How do you know? Remember, this person has high cortisol levels 2 Conduct a corticotropin-releasing hormone (CRH) stimulation test where you inject a shot of CRH. If this test results in a normal increase in ACTH levels, where is the tumor? How do you know? 3 Inject a very high-dose of compound that is a cortisol-receptor agonist. A few hours later measure levels of circulating ACTH. If the test results in normal…
The TRH (thyrotropin releasing hormone) stimulation test is useful in differentiating hypothalamic hypothyroidism from: 1) Primary hypothyroidism 2) Hashimoto's thyroiditis 3) Pituitary hypothyroidism 4) Sub-clinical hypothyroidism no references, just homework
Which two of the following statements are correct? 1. for all cortisol assays, the corticosteroid-binding protein is also being measured 2. salivary cortisol represents 'free' 'active' cortisol 3. urinary cortisol contains bound and free cortisol 4. protein bound cortisol cannot enter cells 5. salivary cortisol contains bound and free cortisol
The TRH (thyrotropin releasing hormone) stimulation test is useful in differentiating hypothalamic hypothyroidism from:? 1) Primary hypothyroidism 2) Hashimoto's thyroiditis 3) Pituitary hypothyroidism 4) Sub-clinical hypothyroidism.
Which of these endocrine cells are also target cells for other hormones? (choose the most inclusive answer) adrenal cortex endocrine cells adrenal cortex endocrine cells and thyroid endocrine cells adrenal cortex endocrine cells, thyroid endocrine cells, and anterior pituitary endocrine cells none of the above endocrine cells are target cells for other hormones
Some hormones acting together results in an impact that is more than additive. True or False? This is a true statement. Please explain why this is not false.
The dexamethasone test involves the administration of a synthetic glucocorticoid. Knowing about negative feedback mechanisms, how do you think this test helps determine the function of the pituitary? Since you couldn't answer one of my questions heres the last one. Describe how steroid hormones, for example cortisol, are metabolized in the body. What are the benefits of using a 24-hour urine test to measure this hormone?
Indicate whether the following statements about the pituitary glands are TRUE or FALSE. If the statement is false, correct the statement to make it true 1. The anterior and posterior pituitary glands are responsible for producing and releasing hormones. 2. The posterior pituitary gland is regulated by the hypothalamus via a positive feedback loop. 3. The hypothalamus regulates the release of cortisol via the sympathetic nervous system and that of epinephrine via the parasympathetic nervous system. 4. The releasing hormones from the hypothalamus stimulate the production of stimulating hormones and human growth hormone.
Identify a true statement about the pituitary gland. Multiple Choice The pituitary gland produces oxytocin and vasopressin. The posterior lobe of the pituitary synthesizes hormones. The posterior lobe of the pituitary gland is an extension of the nerve tissue of the hypothalamus. The hypothalamus produces the hormones that are stored in the anterior lobe of the pituitary gland.
Cortisol Levels in Blood Plasma Patient Time Cortisol Levels (nmol/L) 1 09:00 a.m. 140 1 Midnight 80 2 09:00 a.m. 580 2 Midnight 315 3 09:00 a.m. 350 3 Midnight 235 Three patients had their blood samples analyzed for levels of cortisol hormone. Their blood samples were drawn at 9 a.m. in the morning and at 12 a.m. (midnight). 1) Compare the different levels of cortisol between morning and night. Use data from the table as evidence.
Which of the following endocrine side effects is not typically seen with glucocorticoid use?A. Development of Cushing syndromeB. Increased virility in male patientsC. Delayed growth and development of pediatric patientsD. Decreased carbohydrate toleranceE. Disturbances in ovulatory/menstrual cycles