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23 Cards in this Set
- Front
- Back
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The primary oocyte and primary spermatocyte contain ___ chromosomes.
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46
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The secondary oocyte and secondary spermatocyte contain ___ chromosomes.
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23
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Gametes are formed by the process of ___.
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meiosis
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Cleavage cell division continues to form a ___ (mass of 16 cells).
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morula
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The inner cell mass is called ___.
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blastocyst
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The outer cell mass is called ___.
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trophoblast
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The ___ forms the embryo and amnion.
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blastocyst
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The ___ forms the placenta and chorion.
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trophoblast
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The placenta contains how many veins and arteries?
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1 large vein and 2 small arteries
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This hormone preserves the corpus luteum and its progesterone production so that the endometrial lining of the uterus is maintained.
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hCG
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This hormone modulates fetal and maternal metabolism, participates in the development of maternal breasts for lactation, and decreases maternal insulin activity to increase its availability for fetal nutrition.
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human placental lactogen
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This hormone causes enlargement of a woman's breasts, uterus, and external genitalia; stimulates myometrial contraction.
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estrogen
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This hormone maintains the endometrium, decreases the contractility of the uterus, stimulates maternal metabolism.
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progesterone
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This hormone acts synergystically with progesterone to maintain pregnancy, causes relaxation of the pelvic ligaments, softens the cervix in preparation for birth.
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relaxin
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The preembryonic stage is from ___ through the ___ week.
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fertilization; 2nd
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The embryonic stage is from ___ week through the ___ week.
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2nd; 8th
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The fetal stage is from the end of the ___ week until ___.
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8th; birth
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___ connects the umbilical vein to the inferior vena cava.
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ductus venosus
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___ connects the main pulmonary artery to the aorta.
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ductus arteriosus
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Humans have ___ paired chromosomes that are found in all cells of the body, except the ovum and sperm cells, which have just ___ chromsomes.
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46;23
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FACT:
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Klinefelter syndrome is a chromosomal disorder involving an extra Xchromosome (XXY)
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Turner syndrome is also known as ___.
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monosomy X
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In this syndrome, the female is typically becomes the carrier and will be mildly affected. The male who receives the X chromosome that has a fragile site will exhibit the full effects of the syndrome.
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fragile X
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