LEC 25 BIOL 431

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1
What does the female reproductive system consist of?
Ovaries
Fallopian Tubes
uterus
vagina
vulva
mammary glands
2
What is the function of the ovaries?
Oogenisis and hormone production (progesterone, estrogen, and relaxin)
3
What is Oogenisis?
The formation of a haploid ovum (meiosis) with surrounding layers of supports cells is
4
What is an ovarian follicles and what are the general names?
Immature ova
follicle cell if one layer
granulosa cells if more than one layer
5
What are the 6 stages of development for a follicle?
1. Primoridal follicle
2. primary follicle
3. secondary follicle
4. Graffian follicle
5. corpus luteum
6. Corpus albicans (white body)
6
What happens in with the primordial follicle?
This adds a single layer of squamous like follicular cells surrounding the oocyte
7
What happens during the primary follicle stage ?
develops multiple granulose cell layers surrounding oocyte
8
What happens during the secondary follicle stage?
starts secreting follicular fluid
forms antrum
still contains primary oocyte
9
What happens during the Graffian follicle stage?
Full maturity
oocyte performs meiosis I to form secondary oocyte
ovulation occurs ejecting secondary oocyte
will not complete meiosis II unless fertilized
10
What happens during the Corpus Luteum ?
After oocyte has been ejected progesterone, estrogen, and relaxin are produced
rising prog/estrogen inhibit LH and GnRF
drop in hormone starts menstral flow and corpus luteum starts degeneration
11
what is the corpus albicans ?
The scar of the degenerated corpus luteum
12
what is a Oogonia ?
Egg mother cell
13
What is the primary oocyte stage? (2n)
This is the beginning of meiosis I before birth but doesn’t complete until after puberty due to hormone influence
results in 2 haploid cells and the first polar body
14
What are some facts about the primary oocyte stage?
Diploid cells
Remain in this stage unti stim from FSH
genetic crossover may occur
400,000 remain after puberty but only 400 come to full maturation to ovulation
15
What is the secondary oocyte stage? (n)
larger of two cells
receive most of cytoplasm from division
ovulation occurs ejecting secondary oocyte, secondary polar body, and supporting cell ejected to infundibulum
16
What happens if the oocyte is fertilized and what stage would this occur?
Secondary oocyte stage
if fertilization occurs maturation of secondary oocyte would occur (meiosis II)
if not oocyte degrades and is reabsorbed
17
What is the result of a fertilized secondary oocyte?
further division resulting in a ootid (ovum) and a second polar body
18
What is a zygote?
Fusion off the spermatozoa’s nucleus and to ovum to form a diploid cell (2n)
19
What is the function of the uterus ?
Site of menstrtutaion, implantation, and development of zygote
3L 2W 2.5T
20
What is the function of the cervical glands
found in the mucosa of the cervical canal to secret mucus that cover external ceervcial os to prevent bacterial spread into uterus
21
What are the 3 layers of the uterine wall?
Perimetrium
Myometrium
Endometrium
22
What are the two layers of the endometrium and what are there significance ?
Stratum Functionalis = functions layer, responds to hormonal change
shed during menstration
Stratum basalis = forms her functionalis after mensration, contains numerous uterine glands to secrete glycoproteins to support embryo
23
What is the purpose of the vagina?
birth canal , passageway for menstrual flow, receptacle for sperm
24
What is the parurethral gland? (skenes gland)
ducts embedded on each wall of the urethra secretes mucus
25
What is the greater vestibular glands (bartholins glands)
found on each side of vaginal or five secrets mucus to assist with lubrication
26
What role does prolactin and oxytocin play on mammary glands?
pro = stim milk production
oxy - stim milk ejection
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