NU 404 Unit 3 Exam Questions and Answers| New Update with 100% Correct Answers
What are the three stages of development? pre-embryonic, embryonic, fetal
What is the preembryonic stage? fertilization through 2nd week
What is the embryonic stage? end of 2nd week through 8th week
what is the fetal stage? end of 8th week until birth
how is fetal development measured during pregnancy? by the number of after fertilization
how many trimesters is a pregnancy divided? 3
how many weeks is each trimester? 13 weeks
how many days or weeks is the average pregnancy starting on the date of their last menstrual
period? 280 days or 40 weeks
how many chromosomes does each ovum or sperm have? 23 chromosomes each
when is sex determination and genetic information determined? fertilization/conception
what are the two different sperms that fertilize an ovum? x or y
what is an xx zygote? female
what is an xy zygote? male
, how do identical(monozygotic) twins occur? occur when one fertilized egg splits and
develops into two
how do fraternal(dizygotic) twins develop? when two separate eggs are fertilized by two
different sperm.
where part of the uterus does implantation usually occur? upper uterus (fundus)
during what stage of fetal development are basic structures of all major body organs and main
external features completed? embryonic stage
at what stage does the amnion originate? embryonic
what is the amnion? thin protective membrane over the embryo that contains amniotic fluid
what is the longest period of prenatal development? fetal stage
at what stage is the embryo mature enough to be called a fetus? fetal stage
what surrounds the embryo and increases in volume as the pregnancy progresses? amniotic
fluid
what is the volume of the amniotic sac as pregnancy reaches term? a liter
what is amniotic fluid derived from? fluid from maternal blood and fetal urine
What are the three stages of development? pre-embryonic, embryonic, fetal
What is the preembryonic stage? fertilization through 2nd week
What is the embryonic stage? end of 2nd week through 8th week
what is the fetal stage? end of 8th week until birth
how is fetal development measured during pregnancy? by the number of after fertilization
how many trimesters is a pregnancy divided? 3
how many weeks is each trimester? 13 weeks
how many days or weeks is the average pregnancy starting on the date of their last menstrual
period? 280 days or 40 weeks
how many chromosomes does each ovum or sperm have? 23 chromosomes each
when is sex determination and genetic information determined? fertilization/conception
what are the two different sperms that fertilize an ovum? x or y
what is an xx zygote? female
what is an xy zygote? male
, how do identical(monozygotic) twins occur? occur when one fertilized egg splits and
develops into two
how do fraternal(dizygotic) twins develop? when two separate eggs are fertilized by two
different sperm.
where part of the uterus does implantation usually occur? upper uterus (fundus)
during what stage of fetal development are basic structures of all major body organs and main
external features completed? embryonic stage
at what stage does the amnion originate? embryonic
what is the amnion? thin protective membrane over the embryo that contains amniotic fluid
what is the longest period of prenatal development? fetal stage
at what stage is the embryo mature enough to be called a fetus? fetal stage
what surrounds the embryo and increases in volume as the pregnancy progresses? amniotic
fluid
what is the volume of the amniotic sac as pregnancy reaches term? a liter
what is amniotic fluid derived from? fluid from maternal blood and fetal urine
