Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 43, Problem 26RQ
Major organs begin to develop during which part of human gestation?
- fertilization
- first trimester
- second trimester
- third trimester
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Chapter 43 Solutions
Biology 2e
Ch. 43 - Figure 43.8 Which of the following statements...Ch. 43 - Figure 43.15 Which of the following statements...Ch. 43 - Figure 43.17 Which of the following statements...Ch. 43 - Which form of reproduction is thought to be best...Ch. 43 - Which form of reproduction can result from damage...Ch. 43 - Which form of reproduction is useful to an animal...Ch. 43 - Genetically unique individuals are produced...Ch. 43 - External fertilization occurs in which type of...Ch. 43 - Which term applies to egg development within the...Ch. 43 - Which term applies to egg development outside the...
Ch. 43 - Sperm are produced in the______ scrotum seminal...Ch. 43 - Most of the bulk of semen is made by the...Ch. 43 - Which of the following cells in spermatogenesis is...Ch. 43 - Which female organ has the same embryonic origin...Ch. 43 - Which female organ has an endometrial lining that...Ch. 43 - How many eggs are produced as a result of one...Ch. 43 - Which hormone causes Leydig cells to make...Ch. 43 - Which hormone causes FSH and LH to be released?...Ch. 43 - Which hormone signals ovulation? FSH LH inhibin...Ch. 43 - Which hormone causes the regrowth of the...Ch. 43 - Nutrient and waste requirements for the developing...Ch. 43 - Progesterone is made during the third trimester by...Ch. 43 - Which contraceptive method is 100 percent...Ch. 43 - Which type of short term contraceptive method is...Ch. 43 - Which hormone is primarily responsible for The...Ch. 43 - Major organs begin to develop during which part of...Ch. 43 - Which of the following is false? The endoderm,...Ch. 43 - During cleavage, the mass of cells: increases...Ch. 43 - Which of the following gives rise to the skin...Ch. 43 - The ribs form from the ___________ . notochord...Ch. 43 - Why is sexual reproduction useful if only half the...Ch. 43 - What determines which sex will result in offspring...Ch. 43 - What are the advantages and disadvantages of...Ch. 43 - Why would paired external fertilization be...Ch. 43 - Describe the phases of the human sexual response.Ch. 43 - Compare spermatogenesis and oogenesis as to timing...Ch. 43 - If male reproductive pathways are not cyclical,...Ch. 43 - Describe the events in the ovarian cycle leading...Ch. 43 - Describe the major developments during each...Ch. 43 - Describe the stages of labor.Ch. 43 - What do you think would happen if multiple sperm...Ch. 43 - Why do mammalian eggs have a small concentration...Ch. 43 - Explain how the different germ layers give rise to...Ch. 43 - Explain the role of axis formation in development.
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- _____ production is continuous from puberty onward in males; _____ production is cyclic and intermittent in females. a. Egg; sperm b. Sperm; egg c. Testosterone; sperm d. Estrogen; eggarrow_forwardDefine and describe the main features of the following developmental stages: fertilization, cleavage, gastrulation.arrow_forwardA Survey of Human Development from Fertilization to Birth 4. The gestation of a fetus occurs over 9 months and is divided into three trimesters. Describe the major events that occur in each trimester. Is there a point at which the fetus becomes more human?arrow_forward
- Describe the stages of labor.arrow_forwardDescribe what happens during the first days of embryonic development from the first cell division until implantation.arrow_forwardDescribe the major developments during each trimester of human gestation.Describe the major developments during each trimester of human gestation.arrow_forward
- Describe the developmental events of the second and third trimesterarrow_forwardThe correct order of the process that occurs when a sperm encounters an egg is the sperm reaches ovum, implantation occurs, zygote is formed, embryo begins secreting hCG. sperm reaches ovum, zygote is formed, implantation occurs, embryo begins secreting hCG. sperm reaches ovum, embryo begins secreting hCG, implantation occurs, zygote is formed. sperm reaches ovum, embryo begins secreting hCG, zygote is formed, implantation occurs. OOO QUESTION 20arrow_forwardAfter fertilization a developing embryos goes through several changes. At about 2-3 days, what is the embryo referred to as?arrow_forward
- Which structures are responsible for maintaining levels of estrogen earlier and later in pregnancy? a "corpus luteum earlier, placenta later" b "uterus earlier, ovaries later" c "placenta earlier, umbilical cord later" d "placenta earlier, ovaries later"arrow_forwardDescribe the processes of fertilization, embryonic development, fetal development, and birth.arrow_forwardA full-term female newborn has an abnormality of the abdomen. Physical examination shows a large 6-cm mass protruding from the abdomen at the base of the umbilical cord. The mass is covered by a membrane composed of peritoneum and amnion. Which of the following is the most likely cause or this anormalyA) Enlargement of the fetal organs in the first trimesterB) Failure of the intestines to return to the abdominal cavity at 10 weeks' gestationC) Herniation of the intestines Imrough an imperfectly closed umbilicus after 10 weeks' gestationD) Incomplete closure of the lateral folds at 4 weeks' gestationE) Rupture of the abdominal wall at 4 weeks' gestationarrow_forward
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