Pockets that serve as temporary reservoirs for sperm
Cervical crypts
Sperm can live in the cervical crypts for __________.
Up to 5 days
Sperm reach the secondary oocyte in ________.
30 minutes
Capacitation before fertilization takes ___________.
5-7 hours
The 4 life stages of the ovary:
- Prenatal
- Postnatal or prepubertal
- Postpubertal
- Postmenopausal
Egg production and steroid hormone production takes place in this life stage of the ovary.
Postpubertal
A _______ consists of an immature germ cell (oocyte) surrounded by 1 or more layers of non-germinating cells.
Follicle
In the prenatal stage, PGC's migrate to genital ridges in __________.
Week 3
In the prenatal stage, PGC's differentiate to form oogonia (diploid) in _______.
Weeks 5-7
In the prenatal stage, PGC's undergo ________ to make millions (6-7) of oogonia (diploid).
Mitosis
In the prenatal stage, oogonia (diploid) begin ________ forming primary oocytes (diploid) but stop/arrest in __________.
Meiosis; Prophase I
Prenatal (Before Birth) Stage Events:
PGC --> Oogonium (Female diploid germ cell) [Mitosis] --> Primary Oocyte (arrests in Prophase I) [Meiosis]
The millions (6-7) of primary oocytes arrest in Prophase I (Meiosis I) are held within a ______________.
Primordial follicle
Most follicles will undergo __________.
Atresia (degeneration)
Degeneration of the follicles is known as __________.
Atresia
Most of the primary oocytes arrested in Prophase I in primordial follicles will undergo __________.
Atresia (degeneration)
At birth, only __________ oocytes remain, and less than __________ remain at puberty.
2 Million; 1/2 Million
The state of the ovary from prenatal to prepuberty
From prenatal to prepuberty, the primary oocytes remain ____________.
Arrested in Prophase I
The prenatal to prepuberty ovary
In prepuberty, primary oocytes (diploid) will remain ___________.
Arrested in Prophase I
As puberty approaches, __________, __________, and some __________ will be developing.
Primary; Secondary; Tertiary
Marked by single flat granulosa layer becoming thick and cube shaped cells.
Primary follicle
Marked by multiple layers of granulosa cells and formation of the Zona pellucida (glycoprotein layer) & follicle membrane appear.
Secondary follicle
The glycoprotein layer that encloses the primary oocyte in a secondary follicle.
Zona pellucida
The secondary follicle is marked by __________ and the ____________.
Multiple layers of granulosa cells; Zona pellucida
Primordial, primary & secondary follicles are all generally referred to as ____________.
Preantral follicles
__________ means before the antrum.
Preantral
__________, __________ & __________ are all generally referred to as preantral follicles.
Primordial, primary & secondary follicles
Tertiary & Graafian follicles are known as __________ because they have an __________.
Antral follicles; antrum
__________ & __________ are known as antral follicles because they have an antrum.
Tertiary & Graafian follicles
What is an antrum?
A fluid filled cavity
At this stage, the antrum (fluid filled cavity) appears, and Theca cells are seen on outer surface of follicle membrane.
Tertiary Follicle (Antral follicle) ~ 300 days
In the Antral follicle (Tertiary) the __________ appears, and ____________ are seen on outer surface of follicle membrane.
Antrum; Theca Cells
Prepubertal Ovary
In this stage, a primary oocyte (diploid) is going to be activated every 28 days (cycle)
Puberty Stage
In the puberty stage, a primary oocyte (diploid) is going to be activated every __________.
28 days (cycle)
In the puberty stage, a primary oocyte (within a growing follicle) is going to be undergoing development into a completed __________ and grow into a mature follicle called a __________.
In a Graafian follicle (mature follicle), the __________ is greatly enlarged; __________ & __________ appears.
Antrum; cumulus oophorus & corona radiata
__________ before ovulation the Tertiary follicle transforms into a mature follicle, or __________.
36 hours; Graafian follicle
The __________are what is ovulated on day 14 of the menstrual cycle.
Graafian follicle + secondary oocyte arrested in Metaphase II
Puberty to Menopause Ovary
Progression from Primordial ---> Graafian ~ 9 Months
In Puberty ---> Menopause, an __________ surge is going to occur, followed by _____ and _____ surges around __________ of the menstrual cycle.
estrogen; LH and FSH; Day 12
In the ____________ stage, an estrogen surge is going to occur, followed by LH and FSH surges around day 12 of the menstrual cycle.
Puberty ---> Menopause
The estrogen, LH and FSH surges around day 12 of the menstrual cycle trigger:
- One primary oocyte within a tertiary follicle is going to complete Meiosis I (36 hours before ovulation)
- The oocyte will begin Meiosis II, thus becoming a secondary oocyte, but stop at Metaphase II. The follicle will become Graafian.
- Primary oocyte (diploid) will mature into a secondary oocyte & 1st polar body.
__________ is what will be ovulated on day 14 of the menstrual cycle.
Secondary oocyte arrested in Metaphase II in the mature Graafian follicle
A secondary oocyte arrested in Metaphase II in the mature Graafian follicle is what will be ovulated on ___________.
Day 14 of the menstrual cycle
The follicle will rupture out of the ovary and be drawn into the waiting _____________.
Fimbriae (cilia lined) of the uterine tube (oviduct/Fallopian tube)
Where the follicle ruptured out of the ovary, that space in the ovary is going to ___________.
Bleed and then clot
Lipids will accumulate and it will form the __________.
Corpus luteum or yellow body
Granulosa & Theca cells of the ruptured follicle are transformed into __________.
Luteal cells (will produce progesterone & estrogen)
Progesterone secreted by the corpus luteum will ________________.
Maintain and grow the endometrial lining of the uterus
If fertilization does NOT occur:
- The secondary oocyte + follicle will degenerate + be reabsorbed by uterine tube.
- The Corpus luteum will degrade into the Corpus albicans (white body) and shrivel up and form a scar on the ovary.
If fertilization DOES occur:
The sperm that has undergone capacitation will penetrate the female gamete in the upper 1/3 of the uterine tube
Sperm penetration will trigger:
- The secondary oocyte to complete Meiosis II, thus forming the ovum and 2nd polar body
(Secondary oocyte ---> ovum & 2nd polar body)
Will trigger the secondary oocyte to complete Meiosis II, thus forming the ovum and forming 2nd polar body:
Sperm penetration
The __________ is formed when pronucli of male and pronucli of the female fuse together.
Zygote
Once the zygote is implanted into the endometrium of the uterus:
The zygote will secrete the hormone hCG (Human Chorionic Gonadotropin)
Once the zygote is implanted into the __________ of the uterus, the zygote will secrete __________.
Endometrium;hCG (Human Chorionic Gonadotropin)
__________ will keep the __________ hormonally active (estrogen & progesterone) and the __________ will remain in place to support the embryo with its hormones for ~ 3 months as the __________ forms.
hCG; Corpus luteum; placenta
Oogenesis
In this phase the uterus is prepared for implantation of a fertilized egg
Luteal Phase (period of corpus luteum activity)
Note: This coordinates with the secretory phase of the uterus. The endometrium is built up to be thick and spongy, and is maintained awaiting implantation. When this does not happen the breakdown begins.
The __________ cells secrete progesterone and estrogen
Lutein
__________ is required to maintain pregnancy & inhibits the release of _____ and _____.
Progesterone; FSH; LH
If fertilization and implantation OCCURS, the __________ is retained.
Corpus Luteum
If implantation DOES NOT occur, the __________ degenerates. And, __________ and __________ levels drop.
Corpus Luteum; progesterone and estrogen
Use the diagram of the female anatomy below. This part of the female anatomy contains cilia that will assist the sperm in reaching the egg and is where sperm capacitation and fertilization also occur.
Structure 4
Use the diagram of the female anatomy below. Secondary follicles can be found here.
Structure A
Implantation of the embryo occurs
B) uterus
Use the diagram of the female anatomy below. Where is the endometrium located?
Part C
Which follicle will contain a 10 oocyte arrested in Prophase I?
A) Choices A and B
Use the diagram of the female anatomy below. What structure will secrete progesterone?
Part D
Which follicle type is antral?
B) Tertiary
When does the zona pellucida first form?
D) Secondary
Which of the following are haploid (n)?
F) Both C and D
What type of follicle?
D) Secondary
What is the signal for the secondary oocyte to complete meiosis II?
C) sperm penetration of the gamete
What type of oocyte is contained in the follicle depicted in this picture?
1° oocyte arrested in Prophase I
What is the name of the structure numbered 3 in this diagram?
Antrum
What happens if fertilization does not occur?
A) corpus luteum degrades into the corpus albicans or white body
B) the uterine tube reabsorbs the
female gamete
C) the female gamete comes out in the menstrual cycle
D) a cyst forms and fills with lipids
E) meiosis II completes and a second polar body is formed
F) Choices A and B
G) Choices A and C
H) Choices A and D
I) Choices B and E
F) Choices A and B
In the female reproductive system, a mature follicle or Graafian follicle contains
C) A secondary (2ᵒ) oocyte arrested in Metaphase I of meiosis with 1 polar body
A zygote is formed when the
E) Female and male pronucli fuse
Author
BenWood
ID
262644
Card Set
Chapter 2 The Female Reproductive System
Description
Chapters 2 The Female Reproduction System and the Ovary