Lecture 38 Unit 5 Flashcards
where does fertilization occur
ampulla of fallopian tube
what do the fimbriae do
collect ovum
what happens in the ovary
ovum and hormone production
what happens in the uterus
implantation and contraction
what are germ cells called
oogonia
what do oogonia turn into when they undergo mitosis
primary oocytes
are any oocytes produced after brith
no
how many oocytes are present at birth? at puberty?
birth- 200,000 to 2 million
puberty- 40,000
how many oocytes will mature and be ovulated
400
what happens each month
hormone release causes several follicles to begin maturing but only one secondary oocyte completes maturation and is ovulated
what does the secondary oocyte become when it is fertilized by a sperm
a zygote
what happens if no fertilization occurs
the oocyte dies
what does each follicle consists of
oocyte and follicular cells
what does a developing follicle contain
single maturing oocyte
what is a follicle
primary endocrine tissue in the ovary during the first half of the ovarian cycle when it synthesizes and secretes estradiol
what happens in theca cells
cholesterol > + LH > progesterone > androstenedione
what happens in granulose cells
androstenedione > testosterone > +FSH > estradiol
when does the ability to release eggs begin
puberty
when does reproductive ability end
menopause
where do oocytes mature
in developing follicles
what are the stages of developing follicles
primordial > antral > graafian
what are the 3 phases of the ovarian cycle
follicular phase, ovulation, luteal phase
what happens to the primary oocyte in the follicular pahse
it is suspended in first meiotic division at birth
what are the follicles recruited to grow in the follicular phase
granulosa cells and theca cells
