3: Name that Hormone Flashcards
Responsible for regulating gynecologic organ activities.
- FSH
- LH (Both gonadotropins)
In the absence of pregnancy, progestin levels decline. This allows an increase in what?
- GnRH pulses.
- They return to the frequency associated with the beginning of the follicular phase and a new cycle begins.
A decrease in this promotes a more androgenic microenvironment within adjacent follicles.
FSH
Influences the proliferative phase.
Estrogen
GnRH secretion is modulated by the feedback effects of these 2 hormones.
- Estrogen
- Progesterone
Targets the ovaries, where it stimulates the growth and development of the primary follicles.
FSH
The corpus luteum secretes this hormone.
Progesterone
The decrease in estrogen production by the corpus luteum and the dramatic fall of inhibin levels allow levels of this hormone to rise during the last few days of the menstrual cycle.
FSH
Along with estrogen, it plays a role in declined FSH levels during the follicular phase.
Inhibin
Estrogen’s positive feedback effect on the pituitary causes a surge in these 2 hormones.
- LH
- FSH
Increased levels of this hormone promote stromal vascularization and edema and relax the myometrial fibers that supply the cervix. Activated collagenase causes the tightly bound collagen bundles to form a loose matrix, triggering the cervix to become softer a few days prior to and at ovulation.
Estrogen
High levels of these 2 hormones cause the synthesis of prostaglandins and proteolytic enzymes such as collagenase and plasmin during the ovulatory phase.
- LH
- Progesterone
In response to the dominant follicle’s combined production of estrogen and FSH, receptors for this hormone develop on its outermost granulosa layers.
LH
Causes vaginal cells to become folded and clumped, appearing flatter under a microscope.
Progesterone
Inhibits the peristaltic activity of the fallopian tube smooth muscle.
Progesterone
It is responsible for preparing the mammary gland for lactation and brings about the synthesis of milk.
Prolactin
Cyclic changes in the endometrium, myometrium, and ovaries are caused by these 2 hormones.
- Gonadotropin
- Estrogen
Stimulates epithelial cell activity, resulting in increased cilia movement and secretions in the uterine tubes.
Estrogen
It is responsible for ovulation, corpus luteum formation, and hormone production in the ovaries.
LH
This surge begins 34-36 hours prior to ovulation. Peak occurs 10-12 prior to ovulation.
LH
Governed by a negative feedback mechanism involving steroids.
FSH
This is present in the follicular fluid and suppresses the final maturation of the dominant follicle until the time of ovulation. Its effects end hours before the LH surge that causes ovulation
Oocyte maturation inhibitor (OMI)
This stimulates the release of LH and FSH from the pituitary.
GnRH
Approximately 2 days after the start of menstruation, this hormone stimulates the regeneration of the surface endometrial epithelium, while concurrent simultaneous endometrial shedding is occurring.
Estrogen
