BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
10th Edition
ISBN: 9781305967359
Author: STARR
Publisher: CENGAGE L
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Textbook Question
Chapter 38, Problem 10SA
Put these human developmental events in order, from earliest to latest
| a. blastocyst forms | d. implantation |
| b. heart begins beating | e. breathing practice begins |
| c. gastrulation | f. neural tube forms |
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Which developmental stage is mismatched?
a. second week—implantation
b. third week—heart development begins
c. fourth and fifth week—limb buds appear
d. sixth through eighth week—all organ systems present
e. None of these stages are mismatched.
During morphogenesis, gastrulation does which of the following?A. Gastrulation produces the ectoderm through formation of a blastocyst.B. Gastrulation produces the mesoderm to form the lining of the digestive tract.C. Gastrulation provides the mechanisms whereby cells can form the neural tube.D. Gastrulation produces the endoderm through invagination of the blastula.
Which of the following statements is incorrect?a. The placenta secretes hormones such as progesterone, hCG, and estrogen.b. Embryonic tissue and maternal tissue forms the placenta.c. The chorion supplies nutrients to the embryo by diffusion.d. The umbilical cord is formed by one artery and two veins
Chapter 38 Solutions
BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
Ch. 38 - Prob. 1SACh. 38 - Prob. 2SACh. 38 - Testosterone is secreted by the _______. a. testes...Ch. 38 - Prob. 4SACh. 38 - Prob. 5SACh. 38 - Prob. 6SACh. 38 - Match each term with the most suitable...Ch. 38 - Prob. 8SACh. 38 - A human blastocyst normally implants in...Ch. 38 - Put these human developmental events in order,...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- The development of a zygote into a baby involves pre-embryonic development for the first 2 weeks, followed by embryonic development for the next 6 weeks, and finally fetal development until the baby is born. When is the developing baby considered a fetus? Select one: a. When all major organ systems have formed b. After the neural tube forms c. Once gastrulation is complete d. When most major organ systems have formed; the neural system forms during the fetal stagearrow_forwardWhich of the following statements is false? a. Cadherins, but not integrins play a role in gastrulation. b. Gastrulation creates the primary germ layers c. Gastrulation requires cells to change their gene expression. d. Body axes are stabilized (made permanent) during gastrulation.arrow_forwardWhich of the following rows correctly completes the following sentence? ______A_____ occurs during fetal development when an embryo is not exposed to adequate levels of ____B___ _______ during neurulation. Select one: a. A B Malformation of the limbs Thalidomide b. A B Spina bifida Vitamin B12 c. A B Anencephaly Folic acid d. A B Microcephaly Zika virusarrow_forward
- Which of the following is false? a. The endoderm, mesoderm, ectoderm are germ layers. b. The trophoblast is a germ layer. c. The inner cell mass is a source of embryonic stem cells. d. The blastula is often a hollow ball of cells.arrow_forwardThe first week of human development is characterized by formation of the: A. inner cell mass B. hypoblast C. trophoblast D. blastocyst E. all of the abovearrow_forward1. Embryonic development occurs during this period. A. from the ninth week of gestation to birth B. from fertilization to implantation C. from implantation to the end of the eighth week of gestation D. from conception to birth 2. Part of the gastrulation phase includes the formation of germ layers that will... A. go on to form the placenta. B. form the ectoderm, mesoderm, and endoderm that will become specific tissues and organs. C. spread disease. D. produce the amniotic fluid.arrow_forward
- During embryonic development, unique cell layers develop into specific groups of tissues or organs during a stage called ________. a. the blastula stage b. the germ layer stage c. the gastrula stage d. the organogenesis stagearrow_forwardDuring gastrulation, cells from the _____ layer of the bilaminar germinal disc migrate and form the three primary germ layers. a. notochord b. hypoblast c. epiblast d. mesoblastarrow_forwardAt which of the following stages of development is a frog embryo composed of the most cells? Group of answer choices A. blastula B. neural tube stage C. gastrula D. zygote (fertilized egg)arrow_forward
- A gastrulation does NOT Select one: A. Consist of endoderm, mesoderm, and ectoderm B. Result in the formation of a third layer in the embryonic disc C. Involve the formnation of germ layers D. Include the differentiation of cells into tissues and organsarrow_forwardWhich of the following statements clearly describes the difference between embryonic and fetal development? Select one: a. Embryonic development begins during the tenth week of gestation, a time of morphogenesis. b. Organs continue to grow and develop during embryonic development. c. Fetal development begins during the ninth month of gestation, a time of rapid growth. d. Organs continue to grow and develop during fetal development.arrow_forwardWhich of the following correctly identifies the stages in embryonic development between weeks 2 and 8? Select one: a. Formation of placenta → neurulation → organ formation → gastrulation b. Gastrulation → organ formation → neurulation → formation of placenta c. Gastrulation → neurulation and placental formation → organ formation d. Formation of placenta → gastrulation → organ formation → neurulationarrow_forward
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