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وَكَمْ مِنْ ثَناءٍ جَمِيلٍ لَسْتُ أَهْلاً لَهُ نَشَرْتَهُ.
نمایش بیشتر2 903
مشترکین
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آرشیو پست ها
2 903
Which hormone is primarily used as "probable evidence of ovulation" when measured on day 21 of the menstrual cycle?
A) LH.
B) Estradiol.
C) Progesterone.
D) FSH.
2 903
In the male fetus, which of the following is FALSE?
A) Anti-Müllerian hormone is secreted by Leydig cells.
B) 5-alpha reductase converts testosterone to dihydrotestosterone.
C) The Y chromosome triggers testis development at about 7 weeks.
D) Deficiency in 5-alpha reductase leads to male pseudohermaphroditism.
2 903
Regarding Virilism in females, which statement is INCORRECT?
A) It is characterized by clitoromegaly and deepening of the voice.
B) It is always associated with increased plasma testosterone.
C) It is a milder form of hirsutism with no structural changes.
D) Ovarian or adrenal tumors are potential causes.
2 903
Regarding prolactin measurement, which of the following is FALSE?
A) Samples should be taken 2-3 hours after waking.
B) Stress from venipuncture can falsely elevate levels.
C) Prolactin levels increase after menopause.
D) Pregnancy and lactation are physiological causes of elevation.
2 903
Which of the following is NOT a cause of secondary amenorrhea?
A) Severe weight loss or anorexia nervosa.
B) Turner Syndrome.
C) Polycystic Ovary Syndrome (PCOS).
D) Hyperprolactinaemia.
2 903
Identify the FALSE statement regarding gynecomastia:
A) It can be caused by an increased estrogen-to-androgen ratio.
B) Obesity can contribute to it via increased aromatase activity.
C) It is defined as an increase in male breast fat tissue only.
D) Klinefelter syndrome is a known cause.
2 903
Which of the following drugs is a dopamine agonist used to treat hyperprolactinaemia?
A) Haloperidol.
B) Cabergoline.
C) Metoclopramide.
D) Phenothiazines.
2 903
In Turner Syndrome (45,X0), which clinical feature is typically absent?
A) Short stature.
B) Webbed neck.
C) Precocious (early) puberty.
D) Ovarian dysgenesis.
2 903
Regarding the menstrual cycle:
A) Progesterone is the dominant hormone in the follicular phase.
B) The LH surge occurs approximately 16 hours after ovulation.
C) Estradiol triggers the LH surge via positive feedback.
D) The corpus luteum regresses only if fertilization occurs.
2 903
Regarding the male reproductive system:
A) Leydig cells are responsible for inhibin secretion.
B) Spermatogenesis is independent of testosterone levels.
C) Sertoli cells require both FSH and intratesticular testosterone for sperm production.
D) LH stimulates the basement membrane to produce sperm.
2 903
A patient with Chronic Kidney Disease (CKD) shows signs of hyperprolactinaemia. What is the primary cause of elevated prolactin in this patient?
A) Pituitary adenoma.
B) Reduced plasma clearance of prolactin.
C) Overproduction of TRH.
D) Side effect of dialysis.
2 903
A 24-year-old female with obesity and hirsutism is suspected of having PCOS. Laboratory findings show an elevated LH/FSH ratio and low SHBG. Why is her "free" testosterone level likely elevated?
A) Because low SHBG increases the amount of unbound testosterone.
B) Because high LH inhibits testosterone clearance.
C) Because insulin resistance destroys SHBG receptors.
D) Because FSH is not high enough to convert testosterone to estrogen.
2 903
A woman in her 50s complains of hot flashes and irregular periods. Her FSH level is consistently measured at 45 IU/L. What is the most likely diagnosis?
A) Polycystic Ovary Syndrome (PCOS).
B) Secondary Hypogonadism.
C) Menopause (Primary Ovarian Failure).
D) Hyperprolactinaemia.
2 903
A 28-year-old female presents with amenorrhea and milky nipple discharge. Laboratory tests reveal a significantly elevated serum prolactin level. Which of the following is the most likely physiological mechanism for her amenorrhea?
A) Direct destruction of ovarian follicles by prolactin.
B) Inhibition of the normal pulsatile release of GnRH.
C) Hyperstimulation of the adrenal cortex.
D) Competitive binding of prolactin to estrogen receptors.
2 903
لا تحل وانته ما قاري
اذا ما قاري لا تحل
اقرة المحاضرة يم مصطفى وراها تعال حل وراح تشوف شلون تصير سهله
2 903
Which is INCORRECT regarding clinical findings in lipid disorders?
A) Corneal arcus is seen in Familial Hypercholesterolaemia.
B) Palmar striae are pathognomonic for Type III hyperlipoproteinaemia.
C) Eruptive xanthomata are typical of severe hypertriglyceridemia.
D) Tendon xanthomata are a hallmark of Chylomicron Syndrome.
2 903
Hypobetalipoproteinaemia is often caused by which of the following?
A) A truncated form of apoB
B) A defect in the ABC1 gene
C) Deficiency of LPL
D) Homozygosity for apoE2
