pdf2 Flashcards
chromosome gather at the poles of the cell
they cytoplasm divides
telophase and cytokinesis
homologous chromosomes move to the opposite poles of the cell
anaphase
the chromosomes condens and the nucler envelope breaks down
crossing occurs
prophase
pairs of homologous chromosomes move to the equtor of the cell
metaphase
spermatogenesis are dormant in the seminiferous tubules of ////////druring ///////
tests
during the fetal and postnatal periods
maturation process begins?
at buberty
the entire process which includes sprmiogenesis takes appro?
2 months
gametogenesis means
gamete formation
Process of formation and development of
specialized generative cells, gametes
(oocytes/sperms) from ??
bipotential precursor cells
during gametogenesis what happens to chromosome number
reduced by half and the shape of the cell is altered
sperm with two heads ?
abnormal ;as many as 10 precent of sperms ejaculated are grossly and they do not fertilize
pathogenic
process called nondisjunction; cause
homologous chromomsomes fail to seprate and they fertilize
is the sequence of events by which oogonia primordial germ cells are transformed into mature occytes
oogenesis
all oogina develop into primary occyte ?
before birth
completion of prophase1 does not ocuur until?
adolescence
abnormal oogenesis
frequency of nondidjunction increases with ?
the increased age of women
what is the function of GnRh
stimulates the release of LH and FSH
what stimulates the development of ovarian and the production of estrogen by the follicular cells?
follicle stimulating hormone FSH
what is the function of LH
luteinizing hormone
1 serves as the trigger for ovulation which is release of secondary oocte
2 stimulates the follicular cells and corpus luteum to produce progesterone
changes in the estrogen and progestrone levels causes ?
cyclic changes in the structure of the famale reproductive tract
menstrual phase
- usually lasts 4 to 5 days
the functional layer of the uterine wall is sloughed off discarded with monthly bleeding - the blood discharged from vagina is combined with small pieces of endometrial tissue
-atefr menstruation the eroded endometrium is thin
proliferative phase?
lasts approximately 9 days
Coincides with the growth of
ovarian follicles and
• Is controlled by estrogen secreted
by the follicles.
• There is a two- to three-fold
increase in the thickness of the
endometrium and in its water
content during this phase of repair
and proliferation
Luteal Phase
The luteal (secretory phase), lasts
approximately 13 days,
• Coincides with the formation,
functioning, and growth of the corpus
luteum.
• The progesterone produced by the
corpus luteum stimulates the glandular
epithelium to secrete a glycogen-rich
material.
• The endometrium thickens because of
the influence of progesterone and
estrogen from the corpus luteum
