Lecure 35- Ovarian And Uterine Cycles

Question 1

Ovarian cycle

Answer 1

Set of events that occur in ovaries

Question 2

Uterine cycle

Answer 2

Occurs at same time as ovarian cycle but focuses on changes in uterus to prepare it for fertilized ovum

Question 3

Menstrual cycle

Answer 3

Describes changes in uterus but often refers to ovarian and uterine cycles and hormonal changes throughout the body

Question 4

Follicular phase of ovarian cycle

Answer 4

Follicle develops and oocyte within undergoes meiosis

Question 5

Ovulation

Answer 5

Occurs when the vary wall ruptures and secondary oocyte is expelled, following a peak in LH secretion

Question 6

Luteal phase

Answer 6

Characterized by formation of corpus luteum, begin to secrete progesterone and some estrogens

Question 7

Menarche

Answer 7

First menstrual cycle

Question 8

What do moderate levels of estrogen do?

Answer 8

Exert negative feedback on anterior pituitary gland, inhibiting release of FSH and LH

Question 9

What do high levels of estrogen do?

Answer 9

Exert positive feedback on anterior pituitary, resulting in LH triggering secondary oocyte maturation and ovulation

Question 10

What do rising levels of estrogen during puberty promote?

Answer 10

Oogenesis and follicle growth in ovary

Question 11

Uterine cycle

Answer 11

Series of cyclic changes that uterine endometrium goes through each month in response to changing levels of ovarian hormones in blood

Coordinated with phases of ovarian cycle

Question 12

Menstrual phase (day 1-5)

Answer 12

Time when endometrium is shed from the uterus

Ovarian hormones are at their lowest levels and FSH and LH begin to rise

Question 13

Proliferative phase (preovulatory days 6-14)

Answer 13

Time which endometrium is rebuilt

Question 14

Secretory phase (postovulatory days 15-28)

Answer 14

Endometrium prepares for implantation of embryo