Menstrual Cycle

Question 1

Menstrual/Uterine Cycle

Answer 1

Governs preparation and maintenance of uterine lining

Question 2

Menstrual Phase

Answer 2

Endometrium shed from uterus

Increased estrogen/progesterone stimulate hypothalamus to stop producing FSH and LH

Corpus luteum degrades

Endometrium shed

Question 3

Proliferation Phase

Answer 3

Increased estrogen secreted by growing follicle stimulates endometrium to thicken in preparation of embryo

Question 4

Secretory Phase

Answer 4

After ovulation, estrogen and progesterone secreted by corpus luteum stimulate continued development and maintenance of endometrium

Question 5

Menstrual Cycle- Hypothalamus

Answer 5

Hypothalamus monitros estrogen/progesterone blood levels

When low, secretes GnRH (Gonadotropin Releasing Hormone (GnRH)

Stimulates ant. pit.

Negative feedback

Question 6

Menstrual Cycle- Ant. Pit

Answer 6

In response to GnRH, releases FSH and LH
Causes development of follicle and oocyte

FSH causes follicle to secrete estrogen, endometrium thickens
(Proliferative phase)

Question 7

LH surge

Answer 7

Blood estrogen rises, due to FSH

hypothalamus releases GnRH to trigger large LH release by ant. pit

LH surge in blood triggers ovulation

Question 8

Corpus Luteum

Answer 8

Following ovulation, follicle is now empty of a oocyte

Corpus luteum continues to develop and secretes estrogen and progesterone to prepare the uterus for implantation

Endometrium of uterus begins to thicken with nutrients and blood vessels in response to progesterone and estrogen (secretory phase)

Question 9

HCG

Answer 9

Human Chorionoic Gonadotropin

Released by fertilized egg if it implants to endometrium

Sustains corpus luteum (continued production of progesterone and estrogen)

Question 10

Placenta

Answer 10

Produces progesterone later in pregnancy

HCG no longer needed

Question 11

Pregnancy Test

Answer 11

Checks for HCG