Which of the following events does NOT occur initially during a female reproductive cycle? * FSH & LH stimulates development ovarian follicles & secretion of Progesterone. Estrogen promotes proliferative & secretory phases. FSH & LH stimulates development ovarian follicles& secretion of Estrogen. Hypothalamus release GNRH, which stimulates the Pituitary Gland to secrete FSH & LH. Progesterone promotes the secretory phase.

Which of the following events does NOT occur initially during a female reproductive cycle? * FSH & LH stimulates development ovarian follicles & secretion of Progesterone. Estrogen promotes proliferative & secretory phases. FSH & LH stimulates development ovarian follicles& secretion of Estrogen. Hypothalamus release GNRH, which stimulates the Pituitary Gland to secrete FSH & LH. Progesterone promotes the secretory phase.

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter18: Animal Reproduction And Development

Section: Chapter Questions

Problem 2ACQ: Figure 18.17 Which of the following statements about hormone regulation of the female reproductive...

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Figure 18.17 Which of the following statements about hormone regulation of the female reproductive cycle is false? a. LH and FSH are produced in the pituitary, and estrogen and progesterone are produced in the ovaries. b. Estradiol and progesterone secreted from the corpus luteum cause the endometrium to thicken. c. Both progesterone and estrogen are produced by the follicles. d. Secretion of GnRH by the hypothalamus is inhibited by low levels of estrogen but stimulated by high levels of estrogen.
Match each hormone with its effect. oxytocin a. growth of facial hair testosterone b. uterus contracts LH c. LH, FSH are released GnRH d. surge causes ovulation FSH e. follicle develops HCG f. milk is produced prolactin g. corpus luteum is maintained
Besides producing gametes (sperm and eggs), the primary male and female reproductive organs also produce sex hormones. The _____ and the pituitary gland control secretion of both.
Which hormone causes FSH and LH to be released? a. testosterone b. estrogen c. GnRH d. progesterone
Outline the roles of follicle-stimulating hormone (FSH) and luteinizing hormone (LH) in the ovarian cycle of a human female.
How Is Sex Determined? The absence of a Y chromosome in an early embryo causes the: a. embryonic testis to become an ovary b. Wolffian duct system to develop c. Mllerian duct system to degenerate d. indifferent gonad to become an ovary e. indifferent gonad to become a testis
Why does the estrogen released at the follicular phase inhibit FSH levels by a negative feedback mechanism? A high level of FSH will cause ovulation. A high level of FSH will cause menstruation. To ensure that the endometrium is ready to receive an embryo. To prevent multiple follicles from maturing at the same time.
Which of the following statements about hormone regulation of the female reproductive cycle is false? a. LH and FSH are produced in the pituitary, and estradiol and progesterone are produced in the ovaries. b. Estradiol and progesterone secreted from the corpus luteum cause the endometrium to thicken. c. Both progesterone and estradiol are produced by the follicles. d. Secretion of GnRH by the hypothalamus is inhibited by low levels of estradiol but stimulated by high levels of estradiol.
Which of the following statement correctly describe the role of androgen in the male reproductive system? Select one: A. LH stimulates the Sertoli cell to produce inhibin and to start spermatogenesis. B. Increased levels of inhibin released by the interstitial cells result in lower levels of FSH and testosterone. C. Increased levels of testosterone feedbacks negatively to the anterior pituitary and hypothalamus. D. GnRH is released by the anterior pituitary and stimulates the release of FSH and LH.
Which of the following statement does NOT describe the event that occurs if the ovum is not fertilized? Select one: A. Progesterone maintains the endometrium for the zygote. B. Low level of progesterone results in menstruation. C. The corpus luteum degenerates and stops producing estrogen and progesterone. D. GnRH, FSH, and LH levels begin to increase.
Right before the ovulation, the maturate follicle secretes high levels of estrogen which switches from negative to positive feedback regulation of the HPG axis. Positive feedback regulation of estrogen will result in __________ of estrogen levels, leading to an ____________ surge further increase; progesterone further increase; LH decrease; progesterone decrease, LH
Although the most effective form of an oral contraceptive for woman contain estrogen and progestin, some birth control pills contain a small dose of progestin-only. This is because there are many risks and side effects. Which of the following statements is NOT a reason for using a progestin-only oral contraceptive? Select one: A. progesterone maintains the corpus luteum as corpus luteum release a large amount of progesterone and estrogen. B. progesterone suppresses the maturation of follicles, thereby preventing ovulation of a mature ovum. C. progestin-only oral contraceptives prevent the production of FSH and LH in the anterior pituitary. D. progesterone suppresses the production of GnRH in the hypothalamus.