REVIEW QUESTIONS Flashcards
Hi Jullet! I've been aggregating all the ARS questions from all the lectures so far into this one file.... hopefully a good review pre-finals! (93 cards)
Order these events in the correct sequence of sexual differentiation:
- Differentiation of labial scrotal folds into a scrotum
- Genetic sex
- Formation of seminiferous tubules
- Formation of a testis
- Genetic sex –>
- Formation of a testis –>
- Formation of seminiferous tubules –>
- Differentiation of labial scrotal folds into a scrotum
T/F: the number of germ cells rapidly increases to a max several months after birth
F
T/F: There are two precursors, one precursor of the male and one precursor of the female ductal systems, that lie beside the indifferent gonads.
T
T/F: Germ cells migrate after the primordial gonads have developed into a testis or ovary
F
T/F: the indifferent bi-potential gonads have both sperm and oocytes
F
T/F: The ductal system develops and sends signals to the gonad to facilitate formation of either a testis or ovary
F
Which of the following causes the indifferent gonad to dev into an ovary?
A. Absence of testosterone
B. Presence of oocytes
C. Stimulation of early estrogen production
D. None
Which of the following causes the indifferent gonad to dev into an ovary?
A. Absence of testosterone
B. Presence of oocytes
C. Stimulation of early estrogen production
D. None
In a given fetus the indifferent ductal system in a 46XY fetus surprisingly develops into a uterus and vagina. Where is the MOST LIKELY defect responsible for formation of a uterus and vagina?
A. The 46XY fetus likely was missing a portion of the Y chromosome
B. The 46XY fetus could not produce testosterone
C. The 46XY fetus produced estrogen
D. The 46XY fetus produced AMH but given an estrogen milieu it was not functional
E. The 46XY fetus had a mutation in the AMH gene
In a given fetus the indifferent ductal system in a 46XY fetus surprisingly develops into a uterus and vagina. Where is the MOST LIKELY defect responsible for formation of a uterus and vagina?
A. The 46XY fetus likely was missing a portion of the Y chromosome
B. The 46XY fetus could not produce testosterone
C. The 46XY fetus produced estrogen
D. The 46XY fetus produced AMH but given an estrogen milieu it was not functional
E. The 46XY fetus had a mutation in the AMH gene
A 46XX fetus is surprisingly found to have a testis. Which of the following structures is the fetus also likely to have?
A. enlarged clitoris
B. hymen
C. vagina
D. seminal vesicle
E. cloaca
A 46XX fetus is surprisingly found to have a testis. Which of the following structures is the fetus also likely to have?
A. enlarged clitoris
B. hymen
C. vagina
D. seminal vesicle
E. cloaca
Knowing what you do about the normal HPO axis, androgen excess is most likely related to increased:
A. Granulosa cells in the ovary
B. Adrenal reticularis function
C. Pituitary release of LH
D. Pituitary release of FSH
E. Sensitivity to negative feedback
Knowing what you do about the normal HPO axis, androgen excess is most likely related to increased:
A. Granulosa cells in the ovary
B. Adrenal reticularis function
C. Pituitary release of LH (The high LH overstimulates the ovarian theca cells to make higher levels of androgens in PCOS patient.)
D. Pituitary release of FSH
E. Sensitivity to negative feedback
Of the following, the increased LH to FSH ratio in PCOS is most likely related to:
A. Increased sensitivity to positive feedback
B. Increased pulses of GnRH
C. Direct effect of testosterone on the pituitary
D. Increased inhibin secretion of FSH with a normal LH
Of the following, the increased LH to FSH ratio in PCOS is most likely related to:
A. Increased sensitivity to positive feedback
B. Increased pulses of GnRH (As GnRH (LHRH) pulse amplitude and pulse frequency are increased, the effect of this increased LHRH is an increase in secretion of LH. FSH is slightly decreased.)
C. Direct effect of testosterone on the pituitary
D. Increased inhibin secretion of FSH with a normal LH
The polycystic ovaries in PCOS are likely caused by:
A. Decreased FSH
B. Increased ovarian androgens
C. Increased LH
D. Metabolic factors
E. All of the above
The polycystic ovaries in PCOS are likely caused by:
A. Decreased FSH
B. Increased ovarian androgens
C. Increased LH
D. Metabolic factors
E. All of the above
The slightly decreased FSH levels are still enough to recruit follicles (thus polycystic), but now not high enough to recruit a dominant follicle from the cohort– most of the time. The increased ovarian androgens in the ovarian microenvironment cause atrophy of follicles (thus preventing a dominant follicle as well from developing). The increased LH drives the androgen production to prevent a dominant follicle to appear. And insulin resistance seems to work directly at the ovary to accentuate androgen production (likely through the IGF receptor).
The abnormal bleeding in PCOS is best related to:
A. The presence of estrogen withdrawal
B. The presence of progesterone withdrawal
C. Nonfunctional feedback in H-P-O axis
D. Androgen excess
The abnormal bleeding in PCOS is best related to:
A. The presence of estrogen withdrawal
B. The presence of progesterone withdrawal
**C. Nonfunctional feedback in H-P-O axis **
D. Androgen excess
The H-P-O circuit is dysfunctional in PCOS patients preventing (most of the time) a spontaneously operative negative or positive feedback mechanism to endogenous hormones. As a result, the patients usually don’t ovulate and have long periods of unopposed estrogen and thus endometrial proliferation. Unlike the anovulatory adolescent menstrual cycles where negative feedback is functional and allows for drops in estrogen and estrogen withdrawal, the PCOS endometrium continues to grow unabated until it is so unstable it begins to shed— this may happen over 1 – 3 or more weeks and be excessively heavy. They are missing the compaction and stabilization effect of progesterone that in ovulatory cycles allows a very orderly and timely shedding. Another note: While the HPO axis is usually not functional for feedback from endogenous levels of hormones, it does work when given pharmacologic levels of hormones (like birth control pills) to suppress gonadotropins and thus ovarian androgen production.
Patients with PCOS are at risk for all of the following except:
- Endometrial cancer
- Type 2 Diabetes
- Cardiovascular disease
- Unwanted pregnancy
- Pituitary adenoma
Patients with PCOS are at risk for all of the following except:
- Endometrial cancer
- Type 2 Diabetes
- Cardiovascular disease
- Unwanted pregnancy
•Pituitary adenoma
A 28 year old patient is diagnosed with PCOS and is most concerned about her hirsutism. The best immediate treatment for her is:
A. Laser hair treatment
B. Weight loss
C. Anti-androgen creams
D. Combined hormonal contraceptives
E. Anti-androgen medications
A 28 year old patient is diagnosed with PCOS and is most concerned about her hirsutism. The best immediate treatment for her is:
A. Laser hair treatment
B. Weight loss
C. Anti-androgen creams
**D. Combined hormonal contraceptives **
E. Anti-androgen medications
These patients need suppression of their ovarian androgens first and foremost. Combined hormonal contraceptives is the best way to begin this suppression. It takes 4 – 6 months, however, before they will begin to notice that hair growth has slowed and new hair is not appearing. Patients are instructed that once the hormones have suppressed androgens and new hair is not appearing then they can have the hair present removed by such treatment as laser or electrolysis. Sometimes adding an anti-androgen (e.g spironolactone) adds sufficiently to the hormone therapy. It must never be given by itself in the rare situation that if pregnancy did occur the male genitalia may be underdeveloped. Weight loss helps at least 50% of these patients to reduce insulin resistance and break the vicious cycle that perpetuates the syndrome and they may begin to cycle on their own but this takes time and is very difficult. Finally, some but not all women find anti-androgen creams to be helpful in slowing the hair process— but these are expensive.
A patient with PCOS presents with heavy bleeding for the last 3 weeks not having had a menses in the prior 18 months. The best immediate treatment for her is:
A. Estrogen
B. Progesterone
C. Weight loss
D. Insulin sensitizing agent
A patient with PCOS presents with heavy bleeding for the last 3 weeks not having had a menses in the prior 18 months. The best immediate treatment for her is:
A. Estrogen
**B. Progesterone **
C. Weight loss
D. Insulin sensitizing agent
These patients, when usually anovulatory, lack the stabilizing and compaction effects of progesterone. They thus first and foremost need progesterone to stop the bleeding. We usually given them progesterone over 2 – 3 weeks. When we stop the progesterone, a withdrawal subsequent menses will result. While they primarily need progesterone, if they have bled for a prolonged time, they may also need some estrogen to allow a bit of growth and “healing” effect along with the progesterone.
A female will achieve her maximum number of oocytes:
A. In-utero
B. By mid childhood years
C. Sometime after puberty
D. By age 40 years
E. At the menopause
A female will achieve her maximum number of oocytes:
**A. In-utero **
B. By mid childhood years
C. Sometime after puberty
D. By age 40 years
E. At the menopause
A male will achieve his maximum number of spermatocytes:
A.In-utero
B. By mid childhood years
C. Sometime after puberty
D. By age 40 years
E. After age 50 years
A male will achieve his maximum number of spermatocytes:
A.In-utero
B. By mid childhood years
**C. Sometime after puberty **
D. By age 40 years
E. After age 50 years
An adult woman is given a constant infusion of GnRH. At the conclusion of this study blood is drawn. Which of the following would be possible?
A. FSH levels are elevated
B. No change in FSH levels
C. FSH levels are suppressed
An adult woman is given a constant infusion of GnRH. At the conclusion of this study blood is drawn. Which of the following would be possible?
A. FSH levels are elevated
B. No change in FSH levels
C. FSH levels are suppressed
A 26 year old woman and her 27 year old husband volunteer for a study and are each given an IV bolus of GnRH. Thirty minutes later a blood sample for FSH and LH levels would find:
A. Both levels increased and LH > FSH levels
B. Both levels increased and FSH > LH levels
C. LH and FSH levels unchanged and equivalent
D. LH and FSH levels decreased and equivalent
E. FSH levels increased and LH levels suppressed
A 26 year old woman and her 27 year old husband volunteer for a study and are each given an IV bolus of GnRH. Thirty minutes later a blood sample for FSH and LH levels would find:
**A. Both levels increased and LH > FSH levels **
B. Both levels increased and FSH > LH levels
C. LH and FSH levels unchanged and equivalent
D. LH and FSH levels decreased and equivalent
E. FSH levels increased and LH levels suppressed
A 4 year old male with precocious penile development was diagnosed with an androgen producing adrenal tumor. When compared to levels before this tumor appeared, his LH levels would most likely be:
A. Unchanged
B. Elevated
C. Suppressed
A 4 year old male with precocious penile development was diagnosed with an androgen producing adrenal tumor. When compared to levels before this tumor appeared, his LH levels would most likely be:
A. Unchanged
B. Elevated
C. Suppressed
Too much testosterone suppresses GnRH production in the hypothalamus.
Which of the following best demonstrates positive feedback:
A. FSH stimulates estrogen production
B. Rising estrogen levels stimulate LH secretion
C. Decreasing estrogen levels increase FSH secretion
D. Rising estrogen levels inhibit FSH production
Which of the following best demonstrates positive feedback:
A. FSH stimulates estrogen production (this is an example of feedforward)
**B. Rising estrogen levels stimulate LH secretion **
C. Decreasing estrogen levels increase FSH secretion
D. Rising estrogen levels inhibit FSH production
A patient has radiation therapy that destroys all of her primordial follicles. This will result in:
A. Loss of oocytes (with anovulation) but continuation of estrogen production.
B. Continued ovulation but cessation of estrogen production.
C. Loss of oocytes (with anovulation) and cessation of estrogen production.
A patient has radiation therapy that destroys all of her primordial follicles. This will result in:
A. Loss of oocytes (with anovulation) but continuation of estrogen production.
B. Continued ovulation but cessation of estrogen production.
C. Loss of oocytes (with anovulation) and cessation of estrogen production.
A male works in a battery factory and his exposure to lead destroys his seminiferous tubules. This will result in:
A. Loss of sperm but continuation of androgen production.
B. Continued sperm production but cessation of androgen production.
C. Loss of sperm production and cessation of androgen production.
A male works in a battery factory and his exposure to lead destroys his seminiferous tubules. This will result in:
A. Loss of sperm but continuation of androgen production. (unlike in the female, these functions are separate in the male)
B. Continued sperm production but cessation of androgen production.
C. Loss of sperm production and cessation of androgen production.


