LE 1 Flashcards
(93 cards)
- HPO axis controls the predictability of:
A. Ovarian cycle
B. Pregnancy cycle
C. Uterine cycle
D. Menstrual cycle
D. Menstrual cycle
- Neurohormonal pathway of GnRH
Anterior medial tubule to anterior pituitary gland
- An 18 year old presents with hypogonadrotropic hypogonadism and absence of sense of smell. Result:
Failure of migration of GnRH neurons to the olfactory placode
- Which of the following best describes gonadotrophins?
Large glycoproteins molecules secreted by the anterior pituitary
- The secretion of gonadotrophins is characterized by:
A. Basal levels all throughout fetal life with activation to produce adult levels at the time of puberty
B. Progressively increasing levels from fetal to adult levels at puberty
C. May reach adult levels during fetal life and at birth, remain low until the
onset of puberty
D. Progressively declining levels from fetal life, will only reach adult levels
at the time of each menstrual cycle
A. Basal levels all throughout fetal life with activation to produce adult levels at the time of puberty
- Hemorrhagic conditions affecting the blood supply of the anterior pituitary will manifest as low levels of the following
A. FSH, LH, TSH, ACTH
B. FSH, LH, Prolactin, Oxytocin
C. FSH, LH, TSH, ADH
D. FSH, LH, Oxytocin, ADH
A. FSH, LH, TSH, ACTH
- Which of the following statements best describes the pattern of gonadotrophin secretion?
A. To ensure adequate supply, gonadotrophins are secreted in constant amounts
B. There is a steady state amount of gonadotrophins throughout the menstrual cycle
C. Gonadotrophin secretion varies in amplitude and frequency throughout the menstrual cycle
D. The secretion of gonadotrophins is unaffected by steroid hormone levels
C. Gonadotrophin secretion varies in amplitude and frequency throughout the menstrual cycle
- Gonadotrophins are structurally similar to:
A. Prolactin and cortisol
B. TSH and HCG
C. TRH and ACTH
D. Estradiol and progesterone
B. TSH and HCG
- The two cell hypothesis of steroid production occurs at the level of the
A. Hypothalamus
B. Pituitary
C. Ovary
D. Uterus
C. Ovary
- If an aromatase inhibitor is administered to a woman who is in her follicular phase of the menstrual cycle, which steroid hormone level would be affected?
A. Estradiol
B. Progesterone
C. Testosterone
D. Cortisol
A. Estradiol
- Which of the following physiologic processes are controlled by estrogen and progesterone?
A. Folliculogenesis and endometrial maturation
B. Folliculogenesis and gametogenesis
C. Gametogenesis and endometrial maturation
D. Gametogenesis and development of secondary sexual characteristics
A. Folliculogenesis and endometrial maturation
- Menstruation is a coordinated and periodic event that is characterized by the following, except:
A. Interaction of the hypothalamo-pituitary-ovarian axis
B. Irregular cycles during the first 2 years
C. Regular cycles from menarche until few years to menopause
D. Average onset is at 10 years old
D. Average onset is at 10 years old
- A 12 year old child is brought by her anxious mother. She had her menarche at 11 years old but subsequent menses came at an interval of every 2 months. How would you advise this patient?
A. Adolescents have irregular cycles during the first 2 years from menarche
B. This child should have had regular monthly cycles from the time of menarche
C. There is a need to conduct an investigation at this point
D. The hormonal panel of this child should be checked
A. Adolescents have irregular cycles during the first 2 years from menarche
- The 2 phases of menstruation:
A. Follicular and Luteal
B. Follicular and Secretory
C. Proliferative and Secretory D. Proliferative and Luteal
A. Follicular and Luteal
- What is the prerequisite hormonal change necessary for ovulation to occur?
A. Increasing levels of estradiol leading to the LH surge
B. Increasing levels of progesterone leading to the LH surge
C. Declining levels of FSH leading to the LH surge
D. Declining levels GnRH leading to LH surge
A. Increasing levels of estradiol leading to the LH surge
- Events occurring in the follicular phase, except:
A. Recruitment of cohort of antral follicles
B. Selection of leading follicle
C. Growth of the dominant follicle
D. Development of the corpora lutea
D. Development of the corpora lutea
- Ovulation occurs at mid-cycle and is characterized by:
A. Detachment of the cumulus from the granulosa cells
B. Detachment of the cumulus from the basement membrane
C. Demise of the corpus luteum
D. Degeneration of the corpora albicans
A. Detachment of the cumulus from the granulosa cells
- The uterine endometrium undergoes cyclical changes as a direct response to:
A. Pulsatile GnRH secretion
B. Steadily increasing levels of gonadotrophin
C. Changing levels of ovarian steroids
D. Diminishing levels of activing and inhibin
C. Changing levels of ovarian steroids
19. A 21-year old consults at your clinic regarding the regularity of her menstrual period, you advise that menses should come at an interval of: A. >35 days B. <21 days C. Every 60-90 days D. 21-35 days
D. 21-35 days
- Menstruation is a physical event that is:
A. Predictable and cyclical
B. Probable and conditional
C. Irregular and unpredictable
D. Affected by emotions and stress
A. Predictable and cyclical
- Hypothalamic GnRH neurons are concentrated mostly in what area?
A. Median basilar
B. Posterior
C. Arcuate nucleus
D. Ventrobasilar
C. Arcuate nucleus
- GnRH is a peptide hormone that:
A. Is secreted into the hypophyseal portal circulation to the anterior pituitary
B. Is secreted into the hypophyseal portal circulation into the posterior pituitary
C. Is secreted via direct vascular connections into the anterior pituitary
D. Is secreted via direct vascular connections into the posterior pituitary
A. Is secreted into the hypophyseal portal circulation to the anterior pituitary
- GnRH affects the synthesis and secretion of the following hormones directly
A. TSH and TRH
B. FSH and LH
C. ACTH and prolactin
D. Testosterone and testolactone
B. FSH and LH
- Luteinizing hormone acts on the ovarian thecal cells to:
A. Stimulate estradiol production
B. Stimulate androgen production
C. Down regulate estradiol production
D. Down regulate androgen production
B. Stimulate androgen production