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43 Cards in this Set
- Front
- Back
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Which hormone stimulates minstration?
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Follicle stimulating hormone
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Which hormone brings the folicle to the point of being ready for ovulation? Where is this hormone secreted?
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Lutenizing hormone. Pituitary.
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What phase is the oocyte arrested in before ovulation?
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Meiosis I
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What phase is the oocyte arrested in when ovulation occurs?
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Meiosis II
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What does the remains of the rupture follicle turn into? What hormone stimulates this?
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corpus luteum
LH |
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What structure secretes progesterone to help maintain pregnancy if ferttilization occurs?
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The corpus Luteum
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What does the corpus luteum becomes if fertilization does not occur?
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corpus albicans
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When is the first polar body released?
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at ovulation
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Where does fertilization occur?
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In the ampulla of the uterine tube
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What changes do the sperm undergo in the female?
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Activation by:
-capacitation - acrosome reaction |
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When does meosis II occur?
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at time of fertilization
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When does the 1st mitotic division occur?
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at 30 hours
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When does the morula occur?
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3 days
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how old is the conceptus and what stage is it in when it enters the uterus?
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8 days; blastocyst
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what is the 16 cell stage called?
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morula
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What is a blastocyst?
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a conceptus with a blastocoele
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What does the inner cell mass of the blastocyst become?
Outer cell mass? |
embryo
placenta |
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What cell invade the uterus and eventually become the placenta?
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Trophoblast cells from the epiblast
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What proliferates, envades the endometrium and forms the lacunae? What do the lacunae eventually fill with?
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The syctiotrophoblasts (fused trophoblasts)
the mother's blood |
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What grow into the syncytium and eventually become vascular?
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villi from cytotrophoblasts
- nutrients and O2 from mother's blood diffuse into these vessels and the waste travels in the opposite direction |
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When is the embryo made of a bilaminar disc?
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At the end of the 2nd week
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What is the bilaminar disc made up of?
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The epiblast and hypblast
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What 2 cavities does the epiblast and hypoblast separate? Which layer touches which cavity?
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- amniotic cavity (epiblast)
- yolk sac (hypoblast) |
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What 2 important feature form on the embryonic disc?
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The primitive streak (with primitive streak at one end) and the buccopharyngeal membrane
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What turns the bilaminar disc into the trilaminar disc?
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When the epiblast cells migrate through the primitive streak
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Which layer of the trilaminar disc originate fromt the epiblast?
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All because the epiblast forms the mesiderm and replaces the hypoblast
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What is the notochord?
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A mass of cells, forming a rod-like structure which forms in the midline of the embryo. Epiblast cells migrate cephalad after passing throught the primitive streak.
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Where are notochord cells derived from?
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The epiblast
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What does the notochord organize?
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The formation vertibral column
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What does the notochord persist as in the adult?
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The nucleus pulposus in the vertibral disc
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Where does the nervous system originate from?
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the ectoderm
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Where does the synsory epithelium for the nose, eyes and ears originate from?
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the ectoderm
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Where does the epidermis, hair and nails come from?
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the ectoderm
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Where does subcutaneous glands, mammary glands, pituitary gland come from
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the ectoderm
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Where does the enamel of the teeth come from?
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The ectoderm
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Where does muscle, cartilage, and bone originate from?
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mesoderm
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Where does the heart, blood, and lymph vessels, blood and lymph cells originate from?
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the mesoderm
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Where do the kidneys, gonads and and teir ducts come from?
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the mesoderm
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where do spleen and suprarenal cortex come from?
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the mesoderm
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Where does the epithelial lining of the GI tract, respiratory tract come from?
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the endoderm
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Where does the urinary bladder originate from?
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the endoderm
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Where does the parenchyma of the thyroid, parathyroids, liver and pancreas originate from?
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endoderm
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Where does the epithelial lining of the tympanic cavity and auditory tube originate from?
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The endoderm
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