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23 and 24 AP

Terms in this set (129)

The union of a secondary oocyte and a sperm cells is called
fertilization
Where does fertilization take place
infundibulum of uterine tube
Before fertilization can occur, a _____ oocyte must be ovulated and enter the uterine tube
secondary
What constituent of the semen stimulate the lashing of sperm tails along with muscular contractions of the uterus and uterine tube's walls
prostaglandins
High concentrations of ______ during the first part of the menstrual cycle causes the uterus and cervix to secrete a tiny, watery secretion that promotes sperm transport and survival
estrogens
During the later parts of the menstrual cycle, high concentration of ______ causes the female reproductive tract to secrete a viscous fluid that hampers sperm transport and survival
progesterone
As many as 200-600 million sperm cells may be deposited into the vagina during a single ejaculation, only a few ______ ever reach the secondary oocyte
a. million
b. thousand
c. hundred
c. hundred
The journey of a sperm cell through the uterine tube to reach the fertilized ovum takes how long
less than an hour following intercourse
Put the following in order of first to last in sperm cells joining the secondary oocyte:
a. acrosome release enzymes by exocytosis to digest material of zona pellucida.
b. sperm cells invade the corona radiata which contain follicular cells
c. hundreds of sperm remove the layers that surround the oocyte
d. sperm nucleus enters secondary oocytes cytoplasms and swells
e. the sperm bind a specific class of proteins on the zona pellucida
f. meiosis is complete
g. secondary oocyte divides unequal forming one large cell (ovum/egg) and a tiny second polar body
b, e, a, c, d, g, f
When joining a secondary oocyte, a sperm cell first invades the _____ ____ which is a layer that consist of follicular cells that adhere to the secondary oocyte's surface
corona radiata
What is the enzyme on the sperm cells membrane that aids in initial penetration of the secondary oocyte
hyaluronidase
Hardening of the ___ ____ by secretions of the lysosome-like vesicle beneath the oocyte membrane reduces the chance that other sperm cells will penetrate the oocyte
zona pellucida
Each sex cell has _____ chromosomes, so the product of fertilization is a cell with ______ chromosomes
23; 46
What is the first cell of future offspring & product of fertilization that contains 46 chromosomes
zygote
what is the term for the presence of a developing offspring in the uterus
pregnancy
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