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All of the followings are correct about female reproductive system except----------------.
A. At any one time, ovaries contain follicles and corpora lutea in various stages of
development
B. LH is secreted from Theca cells under the influence of GnRH
C. FSH is secreted from the anterior pituitary gland
D. Estrogen and FSH further stimulate granulosa cell differentiation
E. Progesterone is secreted from the corpus Luteal cell
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- Label the early development stages shown in the following diagram.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.All of the followings are correct regarding Testis, except-----------------------.A. Male LH stimulate Leydig cells inside the seminiferous tubules to secrete TestosteroneB. Testosterone is required for the mitosis and meiosis of spermatogenesisC. FSH is required for the development of Sertoli cellsD. Sertoli cells are part of the blood-Testis barrierE. Inhibin act as a negative feedback to inhibit FSH
- Does the male gonad secrete something that affects male differentiation? In this experiment, the testes were removed from a developing fetus and the subsequent development of the ducts was noted as follows: Experiment Mullerian Wolffian Normal male - + Remove testes + - What would you conclude now about the role of the testes in causing differentiation of the ducts in males?Birth control pills are oral contraceptives taken by women to prevent pregnancies. The most effective forms of birth control pills contain estrogen and a small amount of progestin (a synthetic hormone that mimics the effects of progesterone). The role of estrogen in the birth control pill is to Select one: a. negatively feedback to the anterior pituitary to suppress the production of GnRH b. reduce the progesterone levels in the blood to limit the endometrium buildup c. suppress the shedding of endometrium, thus preventing menstruation d. prevent a rise in the FSH and LH levels, thereby preventing follicle maturationWomen with inadequate secretion of GnRH are often treated for their infertility with drugs that mimic the action of this hormone. Can you suggest a possible reason that such treatment is often associated with multiple births?
- Help me with both of this pleaseeeee Sperm capacitation differs from fertilization because capacitation is the: Group of answer choices A. ) change from the spermatid to a mobile sperm in epididymis B.) entry of the sperm into a receptive oocyte C.) loss of the sperm's acrosome covering to release enzymes D. ) depolarization of the oocyte membrane by the sperm Which of the following hormones is NOT released by the placenta? Group of answer choices A. ) relaxin b.) oxytocin c.) human chorionic thryotropin (hCT) d. ) lactogen (hPL)At the end of the uterine cycle, there is a significant drop in the levels of LH, estrogen, and progesterone.This causes all of the following EXCEPT Select one: a. an increase in smooth muscle contractions of the uterus b. the start of menstruation, which breaks down the blood vessels and tissues formed during the follicular stage c. the maintenance of the corpus luteum to continue producing low levels of progesterone and estrogen d. a negative feedback loop to the pituitary to secrete more FSH and LHAccording to the diagram at right, FSH injections to super-stimulate the ovaries will: a. Rescue the subordinate follicles from atresia b. Reverse atresia of subordinate follicles c. Stimulate new waves of follicular growth d. Cause ovulation of atretic follicles what prevents the dominant follicles of Waves 1 and 2 from ovulating? a. follicles are not big enough b. the animal is not in heat c. the high progesterone prevents the LH/FSH surge d. all of the above e. none of the above
- 1a) State the organ of origin of the following hormones and the function for: GnRH, FSH, LH, Estrogen, and Progesterone. 1b) The menstrual cycle contains both positive and negative feedback loops. Explain how. Please frame your answer using the “monitor -> control centre -> effector” scheme.Complete the following feedback loop for estrogen between day 12 and 14 of ovarian cycle.Pick one from each drop-down menu: (In the photos attached are the options for the feedback loop.)multiple births are observed commonly in women treated for infertility with drugs that stimulate the release of gonadotropic hormones. what could be the reason?
