Review Test Submission: Chapter 17 ExamSKIP TO COURSE MENUSKIP TO TOP FRAME TABSContentUserNaveen Selladurai

CourseBME 111: Engr Perspectives/Biologic Sys (2013 Fall)

TestChapter 17 Exam

Started11/6/13 1:10 AM

Submitted11/25/13 10:32 PM

StatusCompleted

Attempt Score43 out of 43 points

Time Elapsed477 hours, 22 minutes.

Instructions

Question 11 out of 1 points

How were Spemann and Mangold able to tell that the organizer was directing cells of the host embryo to change their fates?Answer

Selected Answer:c.The host cells and the graft cells had different pigmentation.

Correct Answer:c.The host cells and the graft cells had different pigmentation.

Question 21 out of 1 points

What is a ligand?Answer

Selected Answer:a.A molecule that binds to a receptor.

Correct Answer:a.A molecule that binds to a receptor.

Question 31 out of 1 points

Which of the following is true about Spemann's experiments with 2-cell-stage embryos?Answer

Selected Answer:e.Some of the cells formed complete, half-sized embryos, but some of them only formed the ventral side of the embryo.

Correct Answer:e.Some of the cells formed complete, half-sized embryos, but some of them only formed the ventral side of the embryo.

Question 41 out of 1 points

Which of the following contains mostly maternal cells?Answer

Selected Answer:c.The intervillous space

Correct Answer:c.The intervillous space

Question 51 out of 1 points

A fate map can be used to map out the tissues and organs that eventually will develop from specific germ layers. On the fate map, ectoderm will becomeAnswer

Selected Answer:c.the nervous system.

Correct Answer:c.the nervous system.

Question 61 out of 1 points

Which of the following is not a true statement about transcription factors?Answer

Selected Answer:e.a, b, c, & d are all true.

Correct Answer:e.a, b, c, & d are all true.

Question 71 out of 1 points

Which of the folllowing is the last stage of mammalian development to occur before implantation in the uterus?Answer

Selected Answer:e.Blastocyst

Correct Answer:e.Blastocyst

Question 81 out of 1 points

After gastrulation has occurred in frogs, the inner layer of cells is called what?Answer

Selected Answer:d.the endoderm

Correct Answer:d.the endoderm

Question 91 out of 1 points

The transcription of the following genes is regulated by the following combinations of binding sites.Gene 1 is regulated by binding sites A, B and DGene 2 is regulated by binding sites A, D and FGene 3 is regulated by binding sites B, C and DGene 4 is regulated by binding sites B, D and EGene 5 is regulated by binding sites A, D and E.If transciption factors TF-A, TF-B, TF-D and TF-E are all active in the cell, which genes will be transcribed?Answer

Selected Answer:b.Only Gene 1, Gene 4, and Gene 5

Correct Answer:b.Only Gene 1, Gene 4, and Gene 5

Question 101 out of 1 points

Which of the following is true about sperm?Answer

Selected Answer:b.They are haploid and have one copy of each chromosome.

Correct Answer:b.They are haploid and have one copy of each chromosome.

Question 111 out of 1 points

Which of the following is not a true statement about the placenta?Answer

Selected Answer:e.All of these are true statements about the placenta.

Correct Answer:e.All of these are true statements about the placenta.

Question 121 out of 1 points

SpermatogenesisAnswer

Selected Answer:a.apportions cytoplasm equally among resulting cells.

Correct Answer:a.apportions cytoplasm equally among resulting cells.

Question 131 out of 1 points

What are the three basic components of a functional mature sperm cell?Answer

Selected Answer:a.a flagellum, a nucleus, and an acrosome

Correct Answer:a.a flagellum, a nucleus, and an acrosome

Question 141 out of 1 points

How many sperm can be made from each spermatogonium that enters meiosis?Answer

Selected Answer:b.4

Correct Answer:b.4

Question 151 out of 1 points

Which of the following statements is true about chordin?Answer

Selected Answer:d.It is produced in Spemann's Organizer and inhibits BMP-4.

Correct Answer:d.It is produced in Spemann's Organizer and inhibits BMP-4.

Question 161 out of 1 points

Which of these cells only exists in the fallopian tube?Answer

Selected Answer:a.ovum

Correct Answer:a.ovum

Question 171 out of 1 points

For which of these organisms have scientists created the most complete and detailed fate map?Answer

Selected Answer:e.C. elegans

Correct Answer:e.C. elegans

Question 181 out of 1 points

Name the structure within the ovary in which a primary oocyte grows and develops.Answer

Selected Answer:d.a follicle

Correct Answer:d.a follicle

Question 191 out of 1 points

Which of the following is not true about trophoblasts?Answer

Selected Answer:e.Some trophoblasts are incorporated into the growing fetus.

Correct Answer:e.Some trophoblasts are incorporated into the growing fetus.

Question 201 out of 1 points

Which of the following is crucial for proper development of a baby's lungs?Answer

Selected Answer:e.amniotic fluid

Correct Answer:e.amniotic fluid

Question 211 out of 1 points

In humans, when are primary oocytes made?Answer

Selected Answer:a.when the female is still just a fetus

Correct Answer:a.when the female is still just a fetus

Question 221 out of 1 points

Which extraembryonic membrane is used by mammals to form part of the placenta?Answer

Selected Answer:a.the chorion

Correct Answer:a.the chorion

Question 231 out of 1 points

Which of the folllowing is a somatic cell?Answer

Selected Answer:c.Sertoli cell

Correct Answer:c.Sertoli cell

Question 241 out of 1 points

Out of the following organisms, which one would you expect to have the least complete and detailed fate map?Answer

Selected Answer:b.Humans

Correct Answer:b.Humans

Question 251 out of 1 points

What is a zygote?Answer

Selected Answer:a.A fertilized ovum

Correct Answer:a.A fertilized ovum

Question 261 out of 1 points

Which of the following best describes what can be found in chorionic villi?Answer

Selected Answer:a.fetal blood vessels and trophoblasts

Correct Answer:a.fetal blood vessels and trophoblasts

Question 271 out of 1 points

Which of the following is not an organizer?Answer

Selected Answer:c.the ventral side of the gastrula

Correct Answer:c.the ventral side of the gastrula

Question 281 out of 1 points

Which part of the mammalian blastocyst will eventually become the embryo itself and its surrounding membranes?Answer

Selected Answer:d.The inner cell mass or ICM

Correct Answer:d.The inner cell mass or ICM

Question 291 out of 1 points

Which set of events is in the correct chronological order?Answer

Selected Answer:c.Gametogenesis, fertilization, cleavage, formation of the three primary germ layers, organogenesis

Correct Answer:c.Gametogenesis, fertilization, cleavage, formation of the three primary germ layers, organogenesis

Question 301 out of 1 points

Being able to activate expression of a fluorescent protein when a specific gene is expressed has been most useful for fate mapping in which of the following organisms?Answer

Selected Answer:b.Mice

Correct Answer:b.Mice

Question 311 out of 1 points

Which of the four extraembryonic membranes maintains the same form and function in birds and mammals?Answer

Selected Answer:a.the amnion

Correct Answer:a.the amnion

Question 321 out of 1 points

What do the trophoblasts do after the blastocyst attaches to the uterine wallAnswer

Selected Answer:e.They do all of these.

Correct Answer:e.They do all of these.

Question 331 out of 1 points

What is a protease?Answer

Selected Answer:a.A protein that degrades other proteins

Correct Answer:a.A protein that degrades other proteins

Question 341 out of 1 points

The heart, blood vessels, blood cells, skeleton, kidney, spleen, and muscles are all tissues or organs that arise from what primary germ layer?Answer

Selected Answer:b.the mesoderm

Correct Answer:b.the mesoderm

Question 351 out of 1 points

Which of the following is an important function of the zona pellucida?Answer

Selected Answer:a.Prevent the blastocyst from attaching to the wall of the fallopian tube.

Correct Answer:a.Prevent the blastocyst from attaching to the wall of the fallopian tube.

Question 361 out of 1 points

Which axis organizes the body from head to tail?Answer

Selected Answer:a.The anteroposterior axis

Correct Answer:a.The anteroposterior axis

Question 371 out of 1 points

Which of the following statements is true?Answer

Selected Answer:e.Some multicellular organisms can reproduce by both sexual and asexual reproduction.

Correct Answer:e.Some multicellular organisms can reproduce by both sexual and asexual reproduction.

Question 381 out of 1 points

What is 'the node'?Answer

Selected Answer:d.The mammalian equivalent of Spemann's Organizer.

Correct Answer:d.The mammalian equivalent of Spemann's Organizer.

Question 391 out of 1 points

When and how does the blastocyst use proteases?Answer

Selected Answer:e.The blastocyst uses proteases to hatch from the zona pellucida when it reaches the uterus, and then it uses proteases again to digest the extracellular matrix of the uterine wall which allows the blastocyst to bury itself in the uterine wall.

Correct Answer:e.The blastocyst uses proteases to hatch from the zona pellucida when it reaches the uterus, and then it uses proteases again to digest the extracellular matrix of the uterine wall which allows the blastocyst to bury itself in the uterine wall.

Question 401 out of 1 points

Which of the following factors does not make studying human development more difficult.Answer

Selected Answer:e.All of these factors make studying human development more difficult.

Correct Answer:e.All of these factors make studying human development more difficult.

Question 411 out of 1 points

The embryonic stage consisting of a solid, compact mass of sixteen or more cells is called what?Answer

Selected Answer:d.a morula

Correct Answer:d.a morula

Question 421 out of 1 points

What is a fate map?Answer

Selected Answer:c.A diagram that shows the developmental fate of various cells from an early stage embryo.

Correct Answer:c.A diagram that shows the developmental fate of various cells from an early stage embryo.

Question 431 out of 1 points

In this drawing of a frog gastrula, which letter corresponds to the ectoderm?

Answer

Selected Answer:d.A

Correct Answer:d.A