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OB Test I
Question | Answer |
---|---|
Where fertilization normally occurs | outer third of fallopian tube, near ovary |
haploid # of chromosomes | in meiosis where # of chromosomes is reduced to half (23 chromosomes) + 1 sex chromosome |
cell formed by union of sperm and ovum, transported through fallopian tube into uterus | zygote |
morula | ball formed by divided cells of zygote |
decidua | endometrium after zygote implantation |
amniotic sac | formed from chorion and amnion, filled with fluid to allow embryo to float freely |
3 germ layers of embyro | ectoderm, mesoderm, endoderm |
3 fetal circulatory shunts | ductus venosus, foramen ovale, ductus arteriosus |
fetal circ. shunt that diverts blood away from liver as it returns from placenta | ductus venosus |
fetal circ. shunt that diverts most blood from R atrium to L atrium | foramen ovale |
fetal circ. shunt that diverts blood from pulmonary artery to lungs | ductus arteriosus |
when does the foramen ovale close (temporarily) | 2 hours after birth |
when does the ductus arteriosus shunt close | 15 hours after birth |
when does the ductus venosus shunt close functionally AND permanently | when cord is cut, permanently in about 1 week |
monozygotic | identical twins |
dizygotic | fraternal twins |
gravida | any pregnancy, regardless of duration, also # of pregnancies |
nulligravida | woman who has never been pregnant |
primigravida | woman who is pregnant for first time |
multigravida | woman who has been preg before, regardless of duration of pregnancy |
para | woman who has given birth to 1+ children who reached 20+ weeks gestation regardless of whether child still living |
primipara | woman who has given birth to her first child past point of viability regardless of whether the child was alive at birth or now living |
multipara | woman who has given birth to 2+ children past viability |
nullipara | woman who has NOT given birth to a child who reached point of viability |