Why does the estrogen released at the follicular phase inhibit FSH levels by a negative feedback mechanism? A high level of FSH will cause To ensure that the endometrium is ovulation. ready to receive an embryo. A high level of FSH will cause To prevent multiple follicles from menstruation. maturing at the same time.

Why does the estrogen released at the follicular phase inhibit FSH levels by a negative feedback mechanism? A high level of FSH will cause To ensure that the endometrium is ovulation. ready to receive an embryo. A high level of FSH will cause To prevent multiple follicles from menstruation. maturing at the same time.

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Body Structures & Functions Updated

13th Edition

ISBN:9780357191606

Author:Scott

Publisher:Scott

Chapter21: Reproductive System

Section: Chapter Questions

Problem 4RQ

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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.
MenopauseA. Indicates that there are no more follicles in the ovariesB. Is preceded by perimenopause which is characterized by irregular menstruationC. Is characterized by increased GnRH, FSH and LH due to absence of negative feedback from estrogenD. Is defined as the cessation of the monthly menstrual cycle by at least one yearE. All choices refer to menopause.
TRUE OR FALSE. Prolonged estrogen stimulation promotes a release of the anterior pituitary hormone responsible for stimulation ovulation. This is an example of a negative feedback.
Hypogonadism as a condition where the body does not produce enough testosterone. The symptoms of hypogonadism include infertility and a decrease in a secondary sex characteristics. There are two types of hypogonadism. Primary hypogonadism is caused by problems stemming from the testicles, and secondary hypogonadism is caused by problems stemming from the hypothalamus or the pituitary gland. Individuals with hypo gonad is him are often treated with testosterone replacement therapy. Draw or sketch a feedback loop for an individual with Primary Hypogonadism. When constructing a feedback loop: - Clearly label to structures are gonads involved in the feedback loop - Use arrows to indicate which way the signal is headed - Indicate whether the hormone levels are increasing or decreasing. - Include all the hormones involved in the feedback loop. - Don't forget to label whether the feedback loop is positive or negative and which way the feedback signals are headed. Draw or sketch a feedback…
Follicles attempt maturation. One follicle succeeds to do so, while others degenerate along the course of their growth and become replaced by fibrous tissue and atretic follicles. The one that succeeds to mature enlarges further in size and pushes over the tunica albuginea and accumulates more fluid. This is now called which of the following? Secondary follicles None of the above Mature Graafian follicles Primary follicles
During the luteal phase, which hormone is present in the blood stream at high levels? Choose all that apply. Progesterone FSH O LH GNRH Estrogen
FSH and LH secretion is inhibited during the follicle phase by , and inhibited by 0/1 p during the luteal phase of the ovarian cycle. O Estrogen, inhibin inhibin, estrogen GNRH, progesterone GNRH, inhibin Estrogen, progesterone Progesterone, estrogen
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.
Drag and drop each item to the correct position in the diagram. GnRH Anterior pituitary gland Maintains secondary sex characteristics Inhibin Zoom Testis Testosterone Hypothalamus Reset Inhibition Inhibition Anterior pituitary gland LH () Leydig cells (-) Hypothalamus GnRH Testis Inhibition Inhibition - FSH Sertoli cells Spermatogenesis 4
Spermatogenesis is cyclic and exhibits spermatogenic wave inside the seminiferous tubules. Which of the following factor contribute to the spermatogenic cycle/wave? Retinoic acid signaling in the testis. AR levels in Sertoli cells. Activin and inhibin levels within the seminiferous tubule. Androgen receptor (AR) levels in Leydig and peritubular cells. Testosterone levels in the lumen of the seminiferous tubules.
How do follicles influence FSH and LH levels at the end of the follicular phase, right before ovulation? Follicles release high quantities of estrogen, which result in a large increase in LH and a small increase in FSH O Follicles release high quantities of progesterone, which result in a large increase in LH and a small increase in FSH O Follicles release low quantities of estrogen, whch result in a large increase in LH O Follicles release low quantities of progesterone, which result in a large increase in LH and a small increase in FSH
Part A Which of the following is most likely to occur as an immediate result of an injection of estradiol in a female mammal? endometrium will decrease in thickness O follicle will decrease in size ovulation will occur O LH production will increase Submit Request Answer