Female Reproductive System Lecture 12

Question 1

What stimulate follicle maturation?

Answer 1

FSH and LH

Question 2

What stimulates ovulation?

Answer 2

LH surge

Question 3

really study the diagram (long diagram) in ppt and be able to tell what happens at any given time

Question 4

What does the corpus luteum secrete?

Answer 4

estrogen and progesterone

Question 5

What is another name for the egg cell?

Answer 5

Ovum

Question 6

What is the length and width of the ovum?

Answer 6

5 micrometers wide, 50 micrometers long
- 100 micrometers (The width of a human hair)

Question 7

Are Oogonia 1n or 2n?

Answer 7

2n

Question 8

When are oogonia (2n) formed?

Answer 8

They are formed during feral development in the ovary.

Question 9

Explain the journey of oogonia.

Answer 9

Some oogonia degenerate, others ho through oogenesis (15th week- 7th month of gestation in the embryo) to produce primary oocytes

Question 10

What happens when primary oocytes enter meiosis 1?

Answer 10

They are arrested there.

Question 11

How many primary oocytes can be present at birth?

Answer 11

Can be around 2 million

Question 12

By Puberty how many primary oocytes can be present?

Answer 12

There are about 300-400,000

Question 13

Following puberty about two many primary oocytes will continue meiosis and mature?

Answer 13

400

Question 14

Where are oocytes found?

Answer 14

In “follicles”

Question 15

What are the “follicles” in oogenesis?

Answer 15

Cells and fluid that surround the oocyte

Question 16

What do the “follicles” do in oogenesis?

Answer 16

-Keep the oocytes nourished
- Release oestrogen and progesterone

Question 17

What do the “follicles” do once the oocyte leaves the ovary?

Answer 17

They become a corpus luteum

Question 18

What is produced through Oogenesis?

Answer 18

Produces mature oocytes, that are released during ovulation.

Question 19

How do primary oocytes become secondary oocytes?

Answer 19

Primary oocyte completes meioses 1 (reduction division at ovulation to become a secondary oocyte.

Question 20

What happens to the secondary oocyte in meiosis 2?

Answer 20

The secondary oocyte is arrested in meiosis 2 until fertilisation

Question 21

What other production occurs in oogenesis after the production of primary oocytes?

Answer 21

Produces a “polar body” (discarded) and a “secondary oocyte” (N or 23 chromosomes in humans)

Question 22

How many chromosomes do the second oocytes contain?

Answer 22

N or 23 chromosomes in humans

Question 23

What happens if the secondary oocyte is fertilised?

Answer 23

It will undergo meiosis 2

Question 24

What happens if the secondary oocyte is not fertilised?

Answer 24

It will not complete meiosis and will die.

Question 25

Where are the follicles found?

Answer 25

In the ovary

Question 26

What hormones are the follicles capable of secreting?

Answer 26

Estrogen and Progesterone

Question 27

What are the two development phases in the ovary (During ovarian cycle)

Answer 27

- Follicular Phase -Luteal Phase

Question 28

Explain the Follicular phase.

Answer 28

Maturation of follicle and release of oocyte from the follicle at about Day 14

Question 29

Explain the Luteal Phase.

Answer 29

Follicle becomes a "corpus luteum", which continues to secrete hormones.

Question 30

How long does it take for the released egg to die after the uterine wall is shed?

Answer 30

6-24 hours

Question 31

What are primary follicles?

Answer 31

Epithelial cells surrounding a primary oocyte

Question 32

What are secondary follicles?

Answer 32

Secondary oocyte surrounded by cells and fluid

Question 33

What is a vesicular follicle?

Answer 33

Secondary oocyte; follicle fluid content increases, and follicle wall balloons out of ovary.

Question 34

What is ovulation?

Answer 34

Mature egg is releases, and picked up by the frimbriae of the uterine tube

Question 35

What hormone do the primary follicles produce?

Answer 35

Estrogen

Question 36

What hormones does the secondary follicle produce?

Answer 36

estrogen and some progesterone

Question 37

What hormones does the Corpus luteum produce?

Answer 37

estrogen and some progesterone