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SC/NATS1675 A > Female Reproductive System Lecture 12 > Flashcards

Female Reproductive System Lecture 12 Flashcards

1
Q

What stimulate follicle maturation?

A

FSH and LH

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2
Q

What stimulates ovulation?

A

LH surge

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3
Q

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

A
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4
Q

What does the corpus luteum secrete?

A

estrogen and progesterone

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5
Q

What is another name for the egg cell?

A

Ovum

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6
Q

What is the length and width of the ovum?

A

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

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7
Q

Are Oogonia 1n or 2n?

A

2n

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8
Q

When are oogonia (2n) formed?

A

They are formed during feral development in the ovary.

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9
Q

Explain the journey of oogonia.

A

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

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10
Q

What happens when primary oocytes enter meiosis 1?

A

They are arrested there.

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11
Q

How many primary oocytes can be present at birth?

A

Can be around 2 million

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12
Q

By Puberty how many primary oocytes can be present?

A

There are about 300-400,000

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13
Q

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

A

400

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14
Q

Where are oocytes found?

A

In “follicles”

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15
Q

What are the “follicles” in oogenesis?

A

Cells and fluid that surround the oocyte

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16
Q

What do the “follicles” do in oogenesis?

A

-Keep the oocytes nourished
- Release oestrogen and progesterone

17
Q

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

A

They become a corpus luteum

18
Q

What is produced through Oogenesis?

A

Produces mature oocytes, that are released during ovulation.

19
Q

How do primary oocytes become secondary oocytes?

A

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

20
Q

What happens to the secondary oocyte in meiosis 2?

A

The secondary oocyte is arrested in meiosis 2 until fertilisation

21
Q

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

A

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

22
Q

How many chromosomes do the second oocytes contain?

A

N or 23 chromosomes in humans

23
Q

What happens if the secondary oocyte is fertilised?

A

It will undergo meiosis 2

24
Q

What happens if the secondary oocyte is not fertilised?

A

It will not complete meiosis and will die.

25
Q

Where are the follicles found?

A

In the ovary

26
Q

What hormones are the follicles capable of secreting?

A

Estrogen and Progesterone

27
Q

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

A
  • Follicular Phase
    -Luteal Phase
28
Q

Explain the Follicular phase.

A

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

29
Q

Explain the Luteal Phase.

A

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

30
Q

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

A

6-24 hours

31
Q

What are primary follicles?

A

Epithelial cells surrounding a primary oocyte

32
Q

What are secondary follicles?

A

Secondary oocyte surrounded by cells and fluid

33
Q

What is a vesicular follicle?

A

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

34
Q

What is ovulation?

A

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

35
Q

What hormone do the primary follicles produce?

A

Estrogen

36
Q

What hormones does the secondary follicle produce?

A

estrogen and some progesterone

37
Q

What hormones does the Corpus luteum produce?

A

estrogen and some progesterone

SC/NATS1675 A (3 decks)

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