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Embryology - Parker
5/23 Notes
20
Other
Not Applicable
05/26/2007

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Cards

Term
Name the 3 structures of the uterine cycle?
Definition
1. perimetrium
2. myometrium
3. endometrium
Term
Which structure is the functional layer and lines the uterus.
Definition
endometrium
Term
Which phase is seen days 1-4, and sloughing of the functional layer?
Definition
menstrual phase
Term
Which phase is days 5-14 and regeneration of functional layer from basal layer occurs?
Definition
proliferative phase
Term
Which pae is days 15-28, glands secrete glycogen?
Definition
secretory phase
Term
Which phase and what day does the embryo implant?
Definition
day 6 secretory phase, day 20 of uterine cycle
Term
T/F if no fertilization, ischemia in functional layer leads to sloughing?
Definition
true
Term
What hormone promotes proliferation of endometrium during first half of uterine cycle?
Definition
estrogen
Term
What hormone stimulates endometrial glands to secrete glycogen.
Definition
progesterone
Term
T/F rising levels of estrogen and progesterone cause ischemia and sloughing of functional layer of the endometrium?
Definition
False - falling levels
Term
What is the sequence of events beginning with contact of sperm with oocyte membrane and ending with the mingling of maternal and paternal chromosomes (lasts about 24 hrs)?
Definition
fertilization
Term
1. T/F sperm usually lasts for 24 hrs or less, but some up to 3 days?
2. oocyte lasts up to 48 hrs after ovulation?
Definition
1. true
2. false - 24 hrs
Term
Location the gametes meet
Definition
ampulla
Term
What 2 things must spermatozoa undergo before they are able to fertilize the oocyte?
Definition
1. capacitation
2. acrosome reaction
Term
During what stage is the glycoprotein coat removed?
Definition
capacitation
Term
What reaction releases enzymes needed to penetrate the zona pellucida?
Definition
acrosome reaction
Term
Name the 3 phases of fertilization?
Definition
1. penetration of the corona radiata
2. penetration of the zona pellucida
3. fusion of the oocyte and the sperm cell membranes
Term
T/F of the 200 to 300 million spermatozoa deposited in the female genital tract, only 1 reach the site of fertization?
Definition
-False, 300 to 500 reach the site of fertilization, only 1 fertilizes the egg
Term
What is a glycoprotein shell currounding the egg that facilitates and maintains sperm binding and induces the acrosome reaction?
Definition
zona
Term
T/F multiple sperm penetrates the zona pellucida?
Definition
true
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