Question

How does the pituitary gland affect the ovarian cycle?
A. The ovarian cycle controls the release of hormones by the pituitary gland.
B. The hormones that control the ovarian cycle are produced in the pituitary gland.
C. The hormones that control the menstrual cycle are produced in the pituitary gland.
D. The menstrual cycle controls the release of hormones by the pituitary gland and ovarian cycle.

Answer 1

b lh surge produces ovulation

Answer 2

In females, LH supports theca cells in the ovaries that provide androgens and hormonal precursors for estradiol production. At the time of menstruation, FSH initiates follicular growth, specifically affecting granulosa cells.[5] With the rise in estrogens, LH receptors are also expressed on the maturing follicle, which causes it to produce more estradiol. Eventually, when the follicle has fully matured, a spike in 17-hydroxyprogesterone production by the follicle inhibits the production of estrogen, leading to a decrease in estrogen-mediated negative feedback of GnRH in the hypothalamus, which then stimulates the release of LH from the anterior pituitary. This increase in LH production only lasts for 24 to 48 hours. This "LH surge" triggers ovulation, thereby not only releasing the egg from the follicle, but also initiating the conversion of the residual follicle into a corpus luteum that, in turn, produces progesterone to prepare the endometrium for a possible implantation. LH is necessary to maintain luteal function for the first two weeks of the menstrual cycle. If pregnancy occurs, LH levels will decrease, and luteal function will instead be maintained by the action of hCG (a hormone very similar to LH but secreted from the new placenta).

Answer 3

B. The hormones that control the ovarian cycle are produced in the pituitary gland.