Chapter 24 Flashcards
Seminal Vesicles secrete?*****
60% of seminal fluid.
What does seminal vesicles contain?*****
fructose that nourishes sperm
Prostate gland secretes?**
30% seminal fluid
What does the prostate gland contain?****
enzymes that activate the sperm
What does the bulbourethra gland secrete? *****
5% seminal fluid
What does the bulbourethra gland wash away?*****
residual urine in the urethra.
Seminal fluid + sperm =
semen
spermogensis is produced in the?
seminiferous tubules.
Where to sperm mature?
epididymis
What does the acrosome contain?
enzymes which enable sperm to penetrate egg.
The middle piece of a sperm has increased?
mitchondria
How many chromosomes must you have to be close normal?
46
Meiosis is?
nuclear division of gametes (sex cells)
46 is the
diploid number
23 is the
haploid number
the 23rd chromosome is the
sex chromosome
What is crossing over?
When an exchange of genetic material is done.
Surrounding the seminiferous tubules are?***
interstitial cells that produce testosterone.
Sustentacular cells >
nourish the sperm
it takes 12 to 16 days for sperm to?
mature
What propels sperm from the epididymis to the urethra?
Ductus deferens & ejaculatory duct
LH and FSH are *****
sex hormones that comes from the anterior pituitary
LH stimulates? ****
interstitial cells to produce testosterone
FSH stimulates? ****
sperm cell formation
1st follicle-
2nd follicle-
3rd follicle-
1st oocyte
2nd oocyte
releases 2nd oocyte (graafion follicle)
What does the corpus luteum secrete?
progestrone
What does progesterone do?
maintains endometrium
Corpus albicans >
scar tissue
Name the lining’s on the uterus
endometrium(inner)
myometrium (middle)-muscle
perimetrium (outer)
**Fertilization is the joining of?
a sperm cell & a secondary oocyte to form a zygote
*** A embryo is the developing human between the time of?
fertilization & 8 weeks
A fetus is the development of a human between the time of? ***
8 weeks to birth
What is the vagina lined with?
moist stratified squamous epithelium
Breast’s >
produce milk
are exocrine glands
have ducts
FSH & LH stimulate’s the ovaries to produce?
gamete
Estrogen stimulates the?
uterine cycle
Progesterone goes down with the?
shedding of the lining of the uterus.
What are the menstrual cycle phases?
Menstrual phase- endometrium shedding 1-5 weeks
Proliferation phase- endometrium rebuilds 6-14 weeks
Secretory phase- endometrium prepares for embryo 14 to 28 weeks
LH surge is responsible for?
stimulating ovulation
Prolactin stimulates the production of?
milk
Oxytocin is responsible for?
contraction and milk let down
When a sperm penetrates an egg is completes?
mitosis II
Where does fertilization take place?
the fallopian tube.
Morula >
solid ball of cells 16-32 cells
Blastocyte=
has cavity -enters uterine cavity
The gastrula has 3 germ layers what are they?
ectoderm
endoderm
mesoderm
