2019 2020秋G2018 MBBS Histoembryology(山东大学) 最新满分章节测试答案
- Week 1 Introduction and gametogenesis and fertilization test of week 1
- Week 3 Third to eight week of development： Gastrulation and differentiation of trilaminar disc Test
- Week 4 Fetal membrane and placenta Test for week 4
- Week 2 First week and second week of development： Cleavage to implantation Test for week 2
- Week 5 Development of the head and neck Test for week 5
- Week 6 Development of the digestive and respiratory system Test for week 6
- Week 7 Development of urogenital system Test for week 7
- Week 8 Development of cardiovascular system Test for week 8
本答案对应课程为:点我自动跳转查看
本课程起止时间为:2019-11-18到2019-12-31
本篇答案更新状态:已完结
Week 1 Introduction and gametogenesis and fertilization test of week 1
1、 问题:Which of the following is a major characteristic of meiosis I?
选项：
A:Splitting of the centromere
B:Pairing of homologous chromosomes
C:Reducing the amount of DNA to IN
D:Achieving the diploid number of chromosomes
答案: 【Pairing of homologous chromosomes】
2、 问题:A normal somatic cell contains a total of 46 chromosomes.What is the normal complement of chromosomes found in a sperm?
选项：
A:22 autosomes plus a sex chrom osome
B:23 autosomes plus a sex chromosome
C:22 autosomes
D:23 autosomes
答案: 【22 autosomes plus a sex chrom osome】
3、 问题:Which of the following describes the number of chromosomes and amount of DNA in a gamete?
选项：
A:46 chromosomes,1N
B:46 chromosomes,2N
C:23 chromosomes,1N
D:23 chromosomes,2N
答案: 【23 chromosomes,1N】
4、 问题:Which of the following chromosome compositions in a sperm normally results in the production of a genetic female if fertilization occurs?
选项：
A: 23 homologous pairs of chromosomes
B: 23 autosomes plus an X chromosome
C:22 autosomes plus a Y chromosome
D:22 autosomes plus an X chromosome
答案: 【22 autosomes plus an X chromosome】
5、 问题:In the process of meiosis,DNA replication of each chromosome occurs,form ing a structure consisting of two sister chromatids attached to a single centromere.What is this structure?
选项：
A:A duplicated chromosome
B:Two chromosomes
C:A synapsed chromosome
D:A crossover chromosome
答案: 【A duplicated chromosome】
6、 问题:All primary oocytes are formed by
选项：
A:week 4 of embryonic life
B: month 5 of fetal life
C: birth
D:At puberty
答案: 【 month 5 of fetal life】
7、 问题:When does formation of primary spermatocytes begin?
选项：
A:During month 5 of fetal life
B:At birth
C:During month 5 of infancy
D:At puberty
答案: 【At puberty】
8、 问题:In the production of female gametes,which of the following cells can remain dormant for 12 to 40 years?
选项：
A:Primordial germ cell
B:Primary oocyte
C:Secondary oocyte
D:First polar body
答案: 【Primary oocyte】
9、 问题:In the production of male gametes,which of the following cells remains dormant for 12 years?
选项：
A:Primordial germ cell
B:Primary spermatocyt
C:Secondary spermatocyte
D:Spermatid
答案: 【Primordial germ cell】
10、 问题:Approximately how many sperm will be ejaculated by a normal fertile male during sexual intercourse?
选项：
A:20 million
B:35 million
C:100 million
D:350 million
答案: 【350 million】
11、 问题:A young woman enters puberty with approximately 40,000 primary oocytes in her ovary.About how many of these primary oocytes will be ovulated over the entire reproductive life of the woman?
选项：
A:40,000
B:35,000
C:480
D:48
答案: 【480】
12、 问题:How much DNA does a primary spermatocyte contain?
选项：
A:IN
B:2N
C:4N
D:6N
答案: 【4N】
13、 问题:During ovulation,the secondary oocyte resides at what specific stage of meiosis?
选项：
A:Prophase of meiosis I
B:Prophase of meiosis II
C:Metaphase of meiosis I
D: Metaphase of meiosis II
答案: 【 Metaphase of meiosis II】
14、 问题:Concerning maturation of the female gamete(oogenesis),when do the oogonia enter meiosis I and undergo DNA replication to form primary oocytes?
选项：
A:During fetal life
B:At birth
C:At pubery
D:With each ovarian cycle
答案: 【During fetal life】
15、 问题:Where do primordial germ cells initially develop?
选项：
A:In the gonads at week 4 of embryonic development
B:In the yolk sac at week 4 of embryonic development
C: In the gonads at month 5 of embryonic development
D:In the gonads at puberty
答案: 【In the yolk sac at week 4 of embryonic development】
Week 3 Third to eight week of development： Gastrulation and differentiation of trilaminar disc Test
1、 问题:Which germ layers are present at the end of week 3 of development(day 21)?
选项：
A:Epiblast and hypoblast
B: Ectoderm and endoderm
C: Ectoderm,mesoderm,and endoderm
D:Epiblast,mesoderm,and hypoblast
答案: 【 Ectoderm,mesoderm,and endoderm】
2、 问题:Which process establishes the three definitive germ layers?
选项：
A:Neurulation
B: Gastrulation
C: Craniocaudal folding
D: Lateral folding
答案: 【 Gastrulation】
3、 问题:The first indication of gastrulation in the embryo is
选项：
A: formation of the primitive streak
B:formation of the notochord
C:formation of the neural tube
D: form ation of extraembryonic mesoderm
答案: 【 formation of the primitive streak】
4、 问题:The lateral mesoderm is divided into two distinct layers by the formation of the
选项：
A:extraembryonic coelom
B: intraembryonic coelom
C: cardiogenic region
D: notochord
答案: 【 intraembryonic coelom】
5、 问题:Very often the first indication a woman has that she is pregnant is a missed menstrualperiod.In which week of embryonic development will a woman experience her first missedmenstrual period?
选项：
A: Start of week 3
B:Start of week 4
C: Start of week 5
D:Start of week 8
答案: 【 Start of week 3】
6、 问题:The epiblast is capable of forming which of the following germ layers?
选项：
A:Ectoderm only
B: Ectoderm and mesoderm only
C: Ectoderm and endoderm only
D: Ectoderm,mesoderm,endoderm
答案: 【 Ectoderm,mesoderm,endoderm】
Week 4 Fetal membrane and placenta Test for week 4
1、 问题:During the later stages of pregnancy,maternal blood is separated from fetal blood by the
选项：
A:syncytiotrophoblast only
B: cytotrophoblast only
C: syncytiotrophoblast and cytotrophoblast
D: syncytiotrophoblast and fetal endothelium
答案: 【 syncytiotrophoblast and fetal endothelium】
2、 问题:The maternal and fetal components of the placenta are
选项：
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