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
Expert Solution & Answer
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The stage of prenatal development in which there is rapid growth and all of the organ systems are fully functional is referred to as the
a.)first trimester
b.)second trimester
c.)third trimester
d.)zygote phase
Describe the process of development, from fertilization to parturition.
Stages in Development
First trimester
Second trimester
Third trimester
Match the developmental milestone below with the appropriate trimester numbered above.
Developmental Milestone
Number
The embryonic heart begins to beat
Answer
The placenta is formed
Answer
The eyes are open
Answer
The testes descend into the scrotum
Answer
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_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_forwardDefine and describe the main features of the following developmental stages: fertilization, cleavage, gastrulation.arrow_forward
- Which of the following consists of both fetal and maternal tissues? (a) umbilical cord (b) placenta (c) amnion (d) allantois (e) yolk sacarrow_forwardMatch each developmental stage with its description.arrow_forwardWhich female organ has an endometrial lining that will support a developing baby? a. labia minora b. breast c. ovaries d. uterusarrow_forward
- 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 formsarrow_forwardDuring cleavage, the _______ is converted to a ball of cells, which in turn is transformed into the __________. a. zygote; blastocyst b. trophoblast; embryonic disk c. ovum; embryonic disk d. blastocyst; embryonic diskarrow_forwardWhich hormone is primarily responsible for the contractions during labor? a. oxytocin b. estrogen c. -HCG d. progesteronearrow_forward
- What part of the blastocyst develops into the embryo?a. Yolk sacb. Placentac. Polar bodyd. Inner cell massarrow_forwardThe birth starts thanks to increased ... ... release of glucocorticoids from the fetus. ... stretching of the uterine muscles. ... release of oxytocin. ... release of estrogen from the placenta.arrow_forward________________________is the period of development from fertilization to birth, whereas is the period of development from birth to death.arrow_forward
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