Histology of Female Reproductive System Flashcards Preview

SF3-EXAM 4 (CAMELITA) > Histology of Female Reproductive System > Flashcards

Flashcards in Histology of Female Reproductive System Deck (73)
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1

Female external genitalia

–labia majora

–labia minora

–clitoris

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Internal female genitalia 

Ovaries

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Components of premordial foliicles

  • An oocyte surrounded by a single layer of follicular cells

NOTE: Every 28 days the pituitary hormones FSH and LH stimulate the growth of many follicles and maturation of one oocyte within the follicle called the ovarian cycle

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Germinal epithelium of Waldeyer

The ovarian surface epithelium, which is a layer of simple squamous-to-cuboidal epithelial cells covering the ovary. 

NOTE: The germinal epithelium does NOT give rise to primary follicles

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Primordial ovarian follicle

Oocyte-stromal cell constract that is halted at the first meiotic prophase

NOTE: A few primordial follicles are selected to mature into larger, primary follicles

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Secondary follicles are larger and possess a fluid-filled cavity called an ______.

Antrum

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What is the function of the theca interna?

Secretes adrogens which are converted by the granulosa layer into estogens.

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The inner most layer of the cumulus oophorus is the ___________.

Corona radiata

NOTE: The cumulus oophorous is a cluster of cells that surround the oocyte both in the ovarian follicle and after ovulation. This layer of cells must be penetrated by spermatozoa in order for fertilization to occur

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What is the main purpose of the corona radiata?

Supply vital proteins to the cell

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Follicular fluid is rich in ___________.

Hyaluronic acid

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Some LH-RH containing neurons possess an a-type estrogen receptor that _________ (suppresses/stimulates) their function. Some LH-RH containing neurons possess an b-type estrogen receptor that __________ (suppresses/stimulates) their function

Suppresses; stimulates

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Connections between granulosa cells weaken under the influence of ____________, which causes the follicle to rupture. 

plasminogen activator

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The first meiotic division is completed at ovulation with formation of the first polar body.  The oocyte is then called a ____________.

secondary oocyte

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Prior to ovulation, oocytes are arrested at prophase of meoisis I, why?

Due to inhibitory influences of the granulosa cells

NOTE: Activation of an oocyte receptor called GPR3 by an unknown signal increases oocyte cAMP and causes suppression of meiosis

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Metaphase of Meiosis I

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Ovulatory surges in ______ and _____ change the signaling between the oocyte and the granulosa cell.

LH; FSH

NOTE: 

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How are polar bodies formed?

Results from an Unequal Division of the Oocyte Cytoplasm

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What are the components of the zona pellucida?

3 proteins (ZP1, ZP2, ZP3) produced by the oocyte

NOTE: The zona pellucida forms a barrier aroung the oocyte. It is penetrated by thin processes of granulosa cells. 

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_________ release enzymes that alter the zona pellucida, causing it to become impermeable to other sperm.

Cortical granules

NOTE: Fertilization triggers the migration of cortical granules towards the oocyte plasma membrane. Fertilization also stimulates the onset of meiosis II

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Estrogen and progesterone from the ovary target the ___________ of the uterus.

Endometrium

NOTE: This causes it to grow and secrete uterine milk into the uterine lumen.