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Flashcards in Ova Manufacture Deck (27)
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1
Q

What are the 2 million reproductive stem cells of the ovaries?

A

Oogonia (oogonium)

2
Q

What process do Oogonia go through?

Why?

A

Mitosis

Oogonia are diploid cells that must create identical copies

3
Q

What are the cells that are created from Oogonia?

A

Primary Oocyte (Diploid cells)

4
Q

What covers primary oocytes?

A

A layer of tightly attached simple squamous epithelium.

Called follicular cells

5
Q

What is the entire complex of primary oocytes and follicular cells referred to as?

A

Primordial Follicle

6
Q

What process do primary oocytes go through (before puberty)?

A

Meiosis I

Do not complete process until after puberty

7
Q

What is the complex created by primary oocytes?

A

Primary Follicles

8
Q

After puberty, how often does ovulation occur?

A

Approximately every 28 days.

9
Q

What begins the process of ovulation after puberty?

A

FSH is released by the pituitary gland in response to GnRH released by the hypothalamus.

10
Q

How is a primary follicle selected for development?

A

One primary follicle, chosen randomly, reacts to FSH

11
Q

What does FSH do to the “chosen” primary follicle?

A
  • Follicular cells grow and develop a layer of cells around the egg:

Thecal cells

  • secrete follicular fluid
12
Q

What is follicular fluid?

A

Straw colored fluid, rich in estrogens that fills the are between follicular cells and developing egg in space:

Antrum

13
Q

What is the thick membrane that develops around the ova in response to FSH?

A

Zona Pellucida

14
Q

Once a primary oocyte completes process of meiosis I, what happens?

A

Division of cytoplasm occurs unevenly.

Creates two haploid cells:

  1. First Polar Body
  2. Secondary Oocyte
15
Q

What happens to First Polar Body cells?

A

Do not receive sufficient cytoplasm and eventually die and disintegrate

16
Q

What happens to the antrum of secondary follicles?

A

Follicular cells continue to release Follicular fluid until the follicular cells balloon outward.

Graafian cells result

17
Q

What does estrogen do?

A
  1. Causes anterior pituitary gland to release L.H.
  2. Causes endometrial lining of uterus to grow and mature
  3. Inhibits release of FSH
18
Q

What is the “burst of L.H.”

A

Sudden release of L.H. in response to estrogen

19
Q

What does L.H. cause?

A
  1. Increase in body temperature
  2. The rupture of graafian follicle
20
Q

Once the graafian follicle ruptures, what happens?

A

The egg and follicular fluid are released to the fallopian tubes

21
Q

Why does estrogen affect the endometrial lining?

A

Preps it for embryo implantation

22
Q

Why does L.H. prevent the release of FSH?

A

Allows the body to allow fertilization of egg cell before developing another

23
Q

After ovulation, does the body have a main source of estrogen?

A

No

24
Q

What hormone is released to accomodate for the loss of estrogen after ovulation?

A

Progesterone is released by Corpus Luteum

25
Q

What are the Corpus Luteum?

A

Leftover scar tissue from graafian cells that continues to grow for a week after to ovulation

26
Q

How long do the corpus luteum produce progesterone?

A

If pregnant, for the first three months.

If not pregnant, it is reabsorbed into ovary

27
Q

What are the leftover, white scars left by the remains of corpus luteum?

A

Corpus albicans