1. A typical fetus will be _____ times larger at 38 weeks than it was at 9 weeks
ID: 3451877 • Letter: 1
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1. A typical fetus will be _____ times larger at 38 weeks than it was at 9 weeks. 30 10 20 40 2. A typical labor last about: 3 to 7 hours. 5 to 9 hours. 11 to 14 hours. 8 to 12 hours. 3. About _____ million sperm cells are released in a typical ejaculation. 50 to 100 400 to 800 100 to 200 200 to 400 4. All organ systems except the sex organs are present, though not functional, at the beginning of the _____ phase of development. germinal zygote fetal embryonic 5. Ashley contracted rubella while she was pregnant. Her unborn child is most likely to be affected if it is in the _____ of development. the fetal phase the embryonic phase the blastocyst phase the germinal phase 6. At about four days after conception, the cell mass develops a hollow center and is called a: embryo zygote fetus blastocyst 7. At the beginning of the fetal phase of development, the fetus is about: one inch long. half an inch long. two inches long. three inches long. 8. Birth typically occurs _____ weeks after conception. 40 42 38 36 9. Each organ system begins to form during the _____ phase of development. germinal zygote embryonic fetal 10. The cardiovascular system is functioning by the end of week: 4 8 6 10 11. The developing organism is particularly vulnerable during the _____ because this is when the distinct organ systems are being formed. the blastocyst phase the germinal phase the fetal phase the embryonic phase 12. The embryonic phase of development lasts from about _____ after conception. weeks 5 through 11 weeks 3 through 8 weeks 1 through 7 weeks 4 through 9 13. The fetal phase is reached at _____ weeks after conception. 9 8 10 7 14. The first two weeks after conception are referred to as the ______ phase of development. embryonic zygote fetal germinal 15. The germinal phase ends when: the blastocyst attaches to the uterine wall. the blastocyst exits the fallopian tubes. the blastocyst is formed. the blastocyst consists of more than 4000 cells. 16. The outer mass surrounding the embryo becomes: the digestive system the brain the spinal cord the placenta 17. What phase of development gets its name from the Greek word for “swelling”? the fetal phase. the blastocyst phase. the embryonic phase. the germinal phase. 1. A typical fetus will be _____ times larger at 38 weeks than it was at 9 weeks. 30 10 20 40Explanation / Answer
1. The correct answer option is the third option – 20.
The gestation period is of 9 months. A typical fetus at 38 weeks is approximately 20 times the size of the fetus at 9 weeks.
2. The correct answer option is the fourth option – 8 to 12 hours.
Labor means the time period of delivering the baby from the mother’s womb. Labor occurs in 4 stages - stage 1 includes the cervix dilation, stage 2 includes the movement of the baby through the birth canal, in stage 3 the mother tries to push out the baby along with the placenta , and the last stage i.e. stage 4 involves the recovery period ( the baby gets delivered). All these stages last about 8 to 12 hours.
3. The correct answer option is the first option – 50 to 100 million sperm cells are released in a typical ejaculation.
Ejaculation involves the release of semen from the male reproductive part – the penis. The semen consists of the sperm cells.
4. The correct answer option is the third option – Fetal phase of development.
In this phase of development, the sex organs and other organs are developed, but are not functional. This is the last phase of prenatal developmental period.
5. The correct answer option is the first option – the fetal phase.
Rubella is a type of virus infection. If a woman who is pregnant has rubella, her unborn child is said to be unaffected in the fetal phase of development.
6. The correct answer option is the fourth option – blastocyst.
After four days of conception, the first thing that is formed is the embryo in which hollow mass at the center is formed called as blastocyst. Then it develops into an embryo and in the last stage of prenatal development the structure is called as fetus.
7. The correct answer option is the first option – one inch long.
In the beginning of the last phase i.e. fetal phase, the fetus is about one inch long.
8. The correct answer option is the third option – 38 weeks.
The normal gestation period is of 9 months i.e. 38 weeks.
9. The correct answer option is the third option – embryonic phase.
10. The correct answer option is the first option – 4th week.
11. The correct answer option is the fourth option – the embryonic phase.
12. The correct answer option is the second option – weeks 3 through 8.
13. The correct answer option is the first option – 9 weeks.
14. The correct answer option is the fourth option – germinal phase of development.
15. The correct answer option is the first option – the blastocyst attaches to the uterine wall. Then, the germinal phase ends and the embryonic phase begin.
16. The correct answer option is the fourth option – the placenta. The outer mass of the embryo surrounding eventually becomes the placenta.
17. The correct answer option is the third option – the embryonic phase. In Greek language “in” and “bryein” means “to swell inside”. It means the embryo swells inside. Hence, the name is originated from the Greek language.
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