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Column 1 9 column 2 lanugo is shed answer lanugo is

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79) Column 1: 9 Column 2: lanugo is shed Answer: lanugo is shed Topic: EMBRYONIC AND FETAL DEVELOPMENT Irrelevant questions 6) Calcium ions are released as soon as a spermatozoon enters the secondary oocyte. This l eads to changes in the secondary oocyte that block the entry of other sperm. A) Both statements are true. B) Both statements are false. C) The first statement is true; the second is false. D) The second statement is true; the first is false. Answer: A Topic: FERTILIZATION 9) Following implantation, the trophoblast develops into two layers, syncytiotrophoblast (an extracellular material) and cytotrophoblast (a cellular layer). The cytotrophoblast secretes enzymes that assist the embryo in penetrating the endometrium. 8
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14) Following implantation, the stratum functionalis is modified to become the: 17) The hormone _____ causes increased flexibility in certain joints such as the pubic symphysis in the latter part of pregnancy. 32) One advantage of chorionic villi sampling over amniocentesis is that it can be done 6-8 weeks earlier than amniocentesis. Answer: TRUE Topic: PRENATAL DIAGNOSTIC TESTS 33) One advantage of amniocentesis over chorionic villi sampling is that amniocentesis has a lower probability of causing a spontaneous abortion. Answer: TRUE Topic: PRENATAL DIAGNOSTIC TESTS 34) Down syndrome, or trisomy 21, is the leading cause of mental retardation among newborns. Answer: FALSE Topic: APPLICATIONS TO HEALTH 44) The functional changes in sperm while in the female reproductive tract, preparing the sperm to fertilize a secondary oocyte, are collectively referred to as _____. Answer: capacitation Topic: FERTILIZATION 47) The embryonic layer called the _____ develops from the trophoblast of the blastocyst. Answer: chorion Topic: EMBRYONIC AND FETAL DEVELOPMENT 48) The portion of the decidua that separates the embryo from the uterine cavity is called the _____. Answer: decidua capsularis 9
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Topic: EMBRYONIC AND FETAL DEVELOPMENT 49) The maternal part of the placenta is formed from the decidua _____. Answer: basalis Topic: EMBRYONIC AND FETAL DEVELOPMENT 53) A procedure done at 14 to 16 weeks of gestation to test for the presence of certain genetic conditions such as spina bifida and hemophilia is called _____. Answer: amniocentesis Topic: PRENATAL DIAGNOSTIC TESTS 54) The six-week period following delivery, in which maternal organs and physiology return to the prepregnancy state, is called the _____. Answer: puerperium Topic: LABOR 68) Column 1: endoderm Column 2: epithelium of thyroid, parathyroid, pancreas and thymus Answer: epithelium of thyroid, parathyroid, pancreas and thymus Topic: EMBRYONIC AND FETAL DEVELOPMENT 69) Column 1: mesoderm Column 2: epithelium of kidneys and ureters Answer: epithelium of kidneys and ureters Topic: EMBRYONIC AND FETAL DEVELOPMENT 10
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