Oh-Oh Genesis :)

Question 1

definiton of oogensis is

Answer 1

Meiosis , the specialized nuclear division that occurs in the ovaries to produce “the beginning of an egg”.

Question 2

In the fetal period of the ___________ the diploid stem cells of the ovaries, multiply rapidly by mitosis

Answer 2

oogonia

Question 3

before puberty all of the primordial follicles that are recruited undergo ____________

Answer 3

atresia (apoptosis, or programmed cell death)

Question 4

In each cycle, one rescued follicle is “selected” to become the _________ __________and continues meisos I.

Answer 4

dominant follicle

Question 5

what is the FIRST POLAR BODY

Answer 5

the dominant follicle’s production of two haploid cells. the two are quite dissimilar in size. the smaller one is the FIRST POLAR BODY

Question 6

the larger cell of the dominant follicles two haploid cells contains all of the ___________ of the primary oocyte, and is called the ______ ____________

Answer 6

cytoplasm

secondary oocyte

Question 7

T/F: the FIRST POLAR BODy may continue tis development and undergo meisos II, producing two even smaller polar bodies.

Answer 7

TRUE

Question 8

if a sperm penetrates an ovulated secondary oocyte it completes meisos II, yielding one large _________ and a tiny _____ ______ _______

Answer 8

ovum

second polar body

Question 9

what are the potential end products of oogensis:

Answer 9

three tiny polar bodies

one large ovum

Question 10

what is the functional gamete?

Answer 10

the ovum

Question 11

unequal cytoplasmic divisions that occur during oogensis ensure what?

Answer 11

that a fertizlied egg has ample nutrients for its 6-7 day journey to the uterus.

Question 12

corpus luteum produces….

Answer 12

estrogen and progesterone

Question 13

name the ovarian historoly from beginning to end

Answer 13

recruited follicle
maturing follicle
ovulation
corpus luteum
degenerate C. Luteum

Question 14

define zygote

Answer 14

initial cell formed when two gamete cells are joined by means of sexual reporduction

Question 15

what are the two phases that are involved in the maturation of a primordial follicle?

Answer 15

preantral and antral phases

Question 16

what is the first phase of the maturation of a primordial folllicle?

Answer 16

preantral phase - intrafollicular paracrines such as cytokines and growht factors control oocyte and follicle developement

Question 17

what is the second phase of the maturation of a primordial follicle

Answer 17

antral phase - directed by FSH and LH. Activated follicles grow tremendouls and the primary oocyte in the dominant follicle resumes meiosis I.

Question 18

the female reproductive system produces _____ female gametes called ______

Answer 18

haploid

ova

Question 19

the female repreductive system RECEIVES _____ male gametes called _______

Answer 19

haploid

spermatozoa

Question 20

on the outer surface of an ovary there is a single layer of cuboidal epithelium or low columnar eipthlium. what is the name of this outer oayer of the ovary

Answer 20

germinal epitherlium

Question 21

in a mature ovary there is a substantial layer of dense connective tissue found just below the surface layer of germinal epitherlium called?

Answer 21

tunica albuginea

Question 22

what cells migrate from the wall of the yolk sac into indifferent gonad of the developing embryo during the 4th week of development

Answer 22

primordial germ cells

Question 23

in what phase does the primary oocytes arrest in around the 5th month of fetal development

Answer 23

prophase of meiosis I

Question 24

how long are the primary oocytes arrested in the prophase of meisos I

Answer 24

until ovulation

Question 25

in what part of the ovary contains a large number of primordial follicles

Answer 25

cortex

Question 26

what is the main hormone that helps primordial follicles develop into primary folllicles

Answer 26

follicle-stimulating hormone

Question 27

in the primary follicle what is the name of he layer that forms between the layer of granulosa cells and the developing oocyte

Answer 27

zona pellucida

Question 28

what hormone does the theca intena secrete?

Answer 28

androstendione

Question 29

the basic difference between spermatogensis and oogensis is that

Answer 29

one mature ovum is produced in oogensis and four mature sperm are produced in spermatogenesis

Question 30

the organ that makes estrogen and progesterone is the

Answer 30

ovary

Question 31

the surge in LH that occurs during the middle of the ovarian cycle triggers

Answer 31

ovulation

Question 32

which cell type is actually ovulated from the ovary

Answer 32

secondary oocyte

Question 33

which of the following hormones causes the oocyte to mature

Answer 33

FSH - stimulates the follicular cells and oocyte

Question 34

FOLLICLE DEVELOPMENT IN OVARY

Answer 34

1. Primordial follicle - oocyte surrounded by single layer of squamous grnulosa cells
2. Primary follicle - granulosa cells becomes enlarged and cuboital
3. Secondary follicle - fluid-filled vesicles develop among the granulosa cells and a well-devleoped capsule or theca becomes apparant.
4. mature follicle - fluid-filled vesicles form a single antrum. oocyte is located in the cumlus mass.
5. during ovulation, the oocyte is released from the follicle, along with some surrounding granulosa cells of the cumulus mass called the corona radiata.
6. granulosa cells dividie rapidly, enlarge and form yellow corpus luteum. when it degenerates it forms white corpus albicans.