NURS 6501: Final Exam: Please contact Assignment Samurai for help with NURS 6501: Final Exam or any other assignment. Email: assignmentsamurai@gmail.com     An adult female patient presents with a 4-month history of low mood, weight gain, and fatigue. She has no prior history of depression. Laboratory tests are ordered. Which of the following laboratory findings could suggest a neuroendocrine abnormality that may be associated with major depression? Group of answer choices

• Decreased serum cortisol levels in the morning
• Decreased serum adrenocorticotropic hormone (ACTH) levels in the afternoon
• Elevated serum insulin-like growth factor 1 (IGF-1)
• Decreased serum thyroxine (T4) and elevated thyroid-stimulating hormone (TSH) levels

  The correct answer is: Decreased serum thyroxine (T4) and elevated thyroid-stimulating hormone (TSH) levels   Explanation: Decreased serum thyroxine (T4) and elevated thyroid-stimulating hormone (TSH) levels can indicate hypothyroidism, which is known to be associated with depression. In hypothyroidism, the thyroid gland is underactive, leading to low levels of thyroid hormones (T4) and an elevated level of TSH (because the pituitary gland is trying to stimulate the thyroid to produce more thyroid hormones). This can present with symptoms similar to depression, including fatigue, weight gain, and low mood. Thyroid dysfunction is a well-known neuroendocrine abnormality that may be associated with depression.   Other options: Decreased serum cortisol levels in the morning would not typically be associated with major depression. In fact, in many individuals with depression, cortisol levels tend to be elevated, especially in the morning, due to dysfunction of the hypothalamic-pituitary-adrenal (HPA) axis.   Decreased serum adrenocorticotropic hormone (ACTH) levels in the afternoon would not be a typical finding in depression. ACTH levels tend to be elevated in some cases of depression due to an abnormal stress response.   Elevated serum insulin-like growth factor 1 (IGF-1) is not typically associated with depression. IGF-1 levels are more commonly related to growth hormone activity and are not directly linked to major depressive disorders.   Therefore, the most likely laboratory finding that could suggest a neuroendocrine abnormality in this case is decreased serum thyroxine (T4) and elevated TSH levels, indicating possible hypothyroidism.