Which of the following directly promotes the morphogenesis of the penis in human males? A Oxytocin B Testosterone Estrogen D Anti- Müllerian hormone (AMH) E Dihydrotestosterone (DHT)
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- Figure 43.15 Which of the following statements about hormone regulation of the female reproductive cycle is false? LH and FSH are produced in the pituitary, and estradiol and progesterone are produced in the ovaries. Estradiol and progesterone secreted from the corpus luteum cause the endometrium to thicken. Both progesterone and estradiol are produced by the follicles. Secretion of GnRH by the hypothalamus is inhibited by low levels of estradiol but stimulated by high levels of estradiol.Select the FALSE statement/s: A) The functional layer of the endometrium sloughs off when estrogen levels are at their lowest but progesterone levels at their highest. 1 OB) Every month, the 20 secondary follicles release 20 ova. OC) XX genotypic female exposed to high levels of androgen in utero will develop male-like exfernal genitalia OD) Both A and B OE) Both B and CShedding of the functional layer of the endometrium also known as menstruation occurs when a) blood level of progesterone from the corpus luteum increases c) blood level of FSH falls off a) the corpus luteum degenerates and turns into corpus albican e) the corpus luteum starts secreting a large amount of estrogen O Focus nglish (United States)
- Which of the following is NOT TRUE? A) Menopause is marked by elevated levels of gonadotropins. A spermatozoon can survive for more than five days in a female reproductive tract. C) The proliferative endometrial phase is promoted by progesterone. Synthetic estrogens act as contraceptives by preventing the ovarian luteal phase. The hormonal basis of stress-induced amenorrhea is due to the influence of the limbic system on GNRH secretion.Progesterone: 1) Is produced in adult testes and is responsible for genital development, beard growth, muscle development, and sexual drive 2) Is produced by the placenta during pregnancy, with highest levels seen at conception and then steadily decreasing to non-detectable levels at term 3) Is lowest is serum during the luteal phase of the menstrual cycle and highest during the follicular phase 4) Parallels activity of the corpus luteum by rapidly increasing following ovulation and then abruptly falling to initial low concentrations prior to the onset of menstruation no references, just homework.In male fetuses, testosterone is converted into ___ Which is required for genitalia to develop into a penis and scrotum. Complications in the activity of this hormone can disrupt the development of external sex organs in male fetuses, and can produce intersex variations. A) estradiol B) dihydrotestosterone C) Müllerian inhibiting hormone D) luteinizing hormone
- 7) The following events occur during proestrus (PE). Select all that apply: a) The early Graafian follicle matures and becomes ready to ovulate. b) Peak levels of E2 signal the readiness of the follicle leading to the release LH. c) LH stimulates the release of progesterone from the corpus luteum. d) Progesterone from the corpus luteum causes behavioral estrus. e) The LH surge causes ovulation.If the ovum is not fertilized, the corpus luteum regresses, and the endometrium sloughs off to result in the first day of menstrual bleeding. The latter event would be duplicated, even if fertilization occurred, if receptors for which of the following hormones were occupied by an antagonist? A) Dehydroepiandrosterone B) Estradiol C ) Estriol D) Estrone E) ProgesteroneSelect the FALSE statement/s: During oogenesis OA) The 20 primary follicles produce the estrogens O B) The 20 secondary follicles undergo ovulation to release eggs O C) There are more primordial follicles than primary follicles at puberty OD) Both A and B OE) Both B and C
- 98. Which of the following labeled curves best describes the variation of progesterone during the menstrual cycle? A) B) - Concentration of hormone in blood->> E 31319 14 Day of menstrual cycle 28 C) D) E)What causes an erection in the male penis? a) Dilation (opening) of the smooth muscles around the veins leaving the penis and constriction of the smooth muscles around the arteries entering the penis creates engorgement of spongy tissue in the penis with blood. O b) Dilation (opening) of the smooth muscles around the arteries entering the penis and constriction (closing) of the smooth muscles around the veins leaving the penis creates engorgement of spongy tissue in the penis with blood. c) Muscle contractions of the testes d) Muscle contractions along the urethraShedding of the functional layer of the endometrium also known as menstruation occurs when a) the concentration of LH in the blood peaks b ) the corpus luteum degenerates and turns into corpus albican c ) blood level of progesterone from the corpus luteum increases e ) blood level of FSH falls off
