URINARY SYSTEM AND MALE FEMALE REPRODUCTIVE SYSTEMS
FEMALE REPRODUCTIVE TRACT
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
LH; positive
|
|
|
LH; negative
|
|
|
progesterone; postive
|
|
|
progesterone; negative
|
Detailed explanation-1: -positive feedback triggers the anterior pituitary to release more FSH and LH. more FSH and LH cause the ovary to produce more estrogen. the ensuing LH surge is responsible for ovulation.
Detailed explanation-2: -The hypothalamus secretes GnRH in a pulsatile fashion, which triggers FSH and LH release from the anterior pituitary. These, in turn, act on the granulosa and theca cells in the ovary to stimulate follicle maturation and trigger ovulation.
Detailed explanation-3: -As circulating estrogen levels rise on the afternoon of proestrus, they stimulate the hypothalamo-pituitary axis. This estrogen positive feedback is pivotal to stimulate the luteinizing hormone (LH) surge required for ovulation and luteinization of ovarian follicles.