Ovarian Cycle

Question 1

What is the ovarian cycle

Answer 1

The ovarian cycle is defined as the series of changes in the ovary during which follicle matures, ovum is shed and corpus luteum is formed

Question 2

Which hormone stimulates the ovary to produce 15-20 primary follicles

Answer 2

FSH

Question 3

GnRH is produced by

Answer 3

The Hypothalamus

Question 4

GnRH acts on cells of the anterior pituitary gland to secrete

Answer 4

FSH and LH

Question 5

Why is FSH important during the maturation of primary follicles to secondary follicles

Answer 5

Because without it the primary follicle will die and become atretic

Question 6

Which stage of follicle maturation is the longest

Answer 6

The Antral stage

Question 7

The granulosa cells rest on a basement membrane called

Answer 7

Theca Folliculi

Question 8

Granulosa cells and the oocyte secrete a layer of glycoproteins on the surface of the oocyte that forms the

Answer 8

Zona pellucida

Question 9

At the development of the secondary follicle, the granulosa cells surrounding the secondary oocyte are called

Answer 9

Cumulus oophorus

Question 10

The theca interna and granulosa cells produce

Answer 10

Estrogens

Question 11

What is luteinization

Answer 11

Process in which LH stimulates the production of progesterone by follicular stromal cells

Question 12

The granulosa cells of the ruptured follicle and the cells of the theca interna, under the influence of LH do what?

Answer 12

Develop a yellow pigment and change into lutein cells which form the corpus luteum

Question 13

Progesterone together with some estrogen causes what to enter what

Answer 13

The uterine mucosa to enter the secretory stage in preparation for implantation of the embryo

Question 14

What is luteolysis

Answer 14

The degeneration of the lutean cells of the corpus luteum

Question 15

If the oocyte is fertilized, degeneration of the corpus luteum is prevented by

Answer 15

chorionic gonadotropin

Question 16

What happens after progesterone production decreases

Answer 16

Menstrual bleeding is precipitated

Question 17

Degeneration of corpus luteum is prevented by

Answer 17

Human chorionic Gonadotropin

Question 18

Human Chorionic Gonadotropin is secreted by

Answer 18

The syncytiotrophoblast of the developing embryo

Question 19

At what stage is production of progesterone by the yellow luteal cells stopped

Answer 19

After the fourth month

Question 20

Removal of the corpus luteum before the 4th month usually leads to

Answer 20

Abortion