Which of the following is true

Question 1 of 201.0 PointsWhich of the following is true?A.Fertilization usually takes place in the uterus.B.Women can get pregnant only on the day of ovulation.C.Males produce an average of 300 million sperm a day.D.Sperm survive for only one day after intercourse.Question 2 of 201.0 PointsDuring the period of the zygote, the ________ will become the ________.A.amnion; amniotic fluidB.trophoblast; brain and spinal cordC.chorion; placenta and umbilical cordD.embryonic disk; embryoQuestion 3 of 201.0 PointsThe period of the zygote lasts about ________, beginning with ________.A.3 months; fertilizationB.3 months; implantationC.2 weeks; fertilizationD.2 weeks; implantationQuestion 4 of 201.0 PointsThe _________encloses the developing organism in amniotic &A.blastocystB.trophoblastC.chorionD.amnionQuestion 5 of 201.0 PointsThe umbilical cord rarely tangles during pregnancy because the:A.thickness of the amniotic fluid does not allow the cord to float freely in the uterus.B.walls of the cord are much too rigid for it to knot.C.cord is simply too short to knot.D.force of blood flowing through the cord keeps it firm.Question 6 of 201.0 PointsThe period of the embryo lasts from:A.fertilization until the beginning of the second week of pregnancy.B.months four to six of pregnancy.C.implantation until the eighth week of pregnancy.D.the last three months of pregnancy.Question 7 of 201.0 PointsDuring the period of the embryo, the ________ folds over to form the ________.A.blastocyst; digestive tractB.mesoderm; lungsC.ectoderm; the neural tubeD.chorion; placentaQuestion 8 of 201.0 PointsThe most rapid prenatal changes take place during the period of the _________, whereas the rate of body growth is greatest during the period of the _________.A.embryo; fetusB.zygote; fetusC.zygote; embryoD.fetus; embryoQuestion 9 of 201.0 PointsAs early as the third month of pregnancy,A.the fetus can suck its thumb.B.vernix covers the skin of the fetus.C.the fetus has a good chance of survival outside of the uterus if born prematurely.D.most of the brain’s neurons are in placeQuestion 10 of 201.0 PointsAt the end of the second trimester, nearly all of the brain’s ________ are in place. However the brain’s ________ continue to increase at a rapid rate throughout pregnancy and after birth.A.glial cells; neuronsB.neural tubes; neuronsC.neurons; neural tubesD.neurons; glial cellsQuestion 11 of 201.0 PointsThe age of viability occurs sometime between the ________ week of pregnancy.A.19th and 23rdB.28th and 32ndC.25th and 29thD.22nd and 26thQuestion 12 of 201.0 PointsResearch shows that higher fetal activity in the last weeks of pregnancy predicts a more active infant.TrueFalseQuestion 13 of 201.0 PointsThe period of the ________ is the time when serious defects from teratogens are most likely to occur because ________ this time.A.zygote; implantation occurs duringB.embryo; the foundations for all body parts are laid down duringC.fetus; the prenatal organism is developing most rapidly duringD.fetus; birth takes place soon afterQuestion 14 of 201.0 PointsAspirin use during pregnancy:A.is linked to low birth weight and infant death.B.has not been associated with any negative effects.C.is safe among healthy mothers under the age of 35 years.D.offers some protection against infections during the first few months of life.Question 15 of 201.0 PointsThe likelihood of negative effects due to smoking during pregnancyA.are reduced immediately if the mother decides to stop smoking.B.are reduced immediately if the mother decides to smoke occassionally.C.are reduced only if the mother stops before the period of the embryo.D.are not reduced if the mother stops smoking, because the damage has likely already been done.Question 16 of 201.0 PointsResearch on fetal alcohol syndrome (FAS) indicates that:A.the mental impairment done by heavy, regular alcohol use during pregnancy is reversible if the child is raised in an intellectually stimulating environment.B.all fetuses are equally vulnerable to the damaging effects of prenatal alcohol exposure.C.even mild drinking is associated with reduced head size and body growth.D.FAS babies catch up to age-mates in physical size when provided with enriched diets.Question 17 of 201.0 PointsWhich of the following is true regarding HIV and AIDS?A.In South Africa, one-fourth of all pregnant women are HIV-positive.B.Drugs have not yet been successful in reducing the likelihood of prenatal AIDS transmission.C.HIV-positive pregnant women invariably pass HIV to their babies.D.The number of women infected with HIV has decreased in the past decade.Question 18 of 201.0 Points________ supplementation during pregnancy greatly reduces the likelihood of ________.A.Calcium; skeletal abnormalitiesB.Folic acid; neural tube defectsC.Vitamin C; maternal high blood pressureD.Iron; premature birthQuestion 19 of 201.0 PointsProblems during pregnancy are most likely to occur if an Rh-negative mother is carrying her:A.second Rh-positive baby.B.first Rh-negative baby.C.first Rh-positive baby.D.second Rh-negative baby.Question 20 of 201.0 PointsThe more information a pregnant woman seeks about pregnancy, childbirth, and parenting:A.the more likely she is to form an emotional attachment to her fetus during pregnancy.B.the less likely she is to consult her own parents for advice on pregnancy and child rearing.C.the less likely she is to view her obstetrician or her child’s pediatrician as a valuable source of information.D.the more confident she tends to feel about her own ability to be a good mother.