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Postmenopausal estrogen therapy has been shown to increase a female's risk of all the following clinical outcomes except:
- A. Breast cancer
- B. Hip fracture
- C. Myocardial infarction
- D. Venous thromboembolism Endocrine Answers 1 C 26 B 51 D 76 B 2 C 27 A 52 A 77 C 3 B 28 C 53 B 78 D 4 B 29 D 54 B 79 D 5 C 30 B 55 C 80 C 6 A 31 B 56 C 81 C 7 A 32 D 57 B 82 A 8 B 33 D 58 C 83 C 9 C 34 C 59 A 84 B 10 C 35 C 60 A 85 A 11 B 36 A 61 B 86 B 12 A 37 D 62 A 87 D 13 B 38 B 63 A 88 A 14 C 39 D 64 B 89 C 15 D 40 A 65 B 90 A 16 D 41 D 66 D 91 D 17 A 42 D 67 A 92 B 18 C 43 D 68 C 93 A 19 A 44 B 69 A 94 A 20 B 45 B 70 A 95 A 21 A 46 A 71 A 96 D 22 B 47 C 72 B 97 D 23 B 48 A 73 D 98 B 24 B 49 D 74 B 99 D 25 B 50 C 75 D 100 B
Correct Answer: B
Rationale: Postmenopausal estrogen therapy has been shown to have a protective effect on bone density and reduce the risk of osteoporosis-related fractures, including hip fractures. Estrogen therapy helps to maintain bone strength and reduce the chances of fractures in postmenopausal women. Therefore, estrogen therapy does not increase the risk of hip fractures; in fact, it may decrease the risk of hip fractures in this population.
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Which of the followings is consistent with neuropathic pain due to diabetes:
- A. Burning pain
- B. Electric shock quality
- C. Tingling
- D. All of the above
Correct Answer: D
Rationale: Neuropathic pain due to diabetes can present with a variety of symptoms, including burning pain, electric shock quality, and tingling sensation. These symptoms are commonly reported by individuals with diabetic neuropathy, which is the most common form of neuropathic pain associated with diabetes. The combination of these sensations can significantly impact the quality of life for those living with diabetes and neuropathic pain. Therefore, all of the above options are consistent with neuropathic pain due to diabetes.
Oxytocin:
- A. is not produced in males.
- B. inhibits lactation.
- C. stimulates smooth muscle contraction.
- D. is produced primarily in the SON in the hypothalamus.
Correct Answer: C
Rationale: Oxytocin is a hormone that is produced in both males and females. In females, oxytocin plays a crucial role in various physiological processes, notably during labor and childbirth. Oxytocin acts on the smooth muscles of the uterus, causing them to contract during labor (parturition) and helps in the ejection of milk during breastfeeding. This hormone is primarily synthesized in the paraventricular nucleus (PVN) and the supraoptic nucleus (SON) of the hypothalamus and stored in the posterior pituitary gland before being released into the bloodstream. Overall, oxytocin's main function is to stimulate smooth muscle contraction in the uterus and the mammary glands.
What is the most common cause for the overproduction of growth hormone in acromegaly?
- A. Hypothalamic lesion
- B. Hyperplasia of the pituitary stalk
- C. Pituitary lesion
- D. Pituitary adenoma
Correct Answer: D
Rationale: Acromegaly is typically caused by the overproduction of growth hormone (GH) by the pituitary gland. In around 95% of cases, this overproduction is due to the presence of a non-cancerous tumor called a pituitary adenoma. These adenomas are benign, slow-growing tumors that cause the pituitary gland to produce excessive amounts of growth hormone, leading to the characteristic symptoms of acromegaly such as enlargement of the bones and soft tissues.
Which of the following is not a function of binding proteins?
- A. Bind protein hormones
- B. Bind steroid hormones
- C. Bind thyroid hormones
- D. Mediate hormonal effects
Correct Answer: D
Rationale: Binding proteins are essential in transporting hormones through the bloodstream and protecting them from rapid degradation by enzymes. These proteins do not actually mediate the hormonal effects themselves. Hormonal effects are typically mediated by the hormone-receptor interactions at target cells. Binding proteins primarily serve as carriers for hormones and maintain their stability and availability in the circulation.
Acromegaly is associated with all of the following except:
- A. Acanthosis nigricans
- B. Fibromata mollusca
- C. Micrognathia
- D. Cardiomegaly
Correct Answer: C
Rationale: Acromegaly is a disorder caused by excessive growth hormone production after the closure of the epiphyses (growth plates) in bones, leading to abnormal growth of tissues and organs. The following options are associated with acromegaly: