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 21RQ
Nutrient and waste requirements for the developing fetus are handled during the first few weeks by:
- the placenta
- diffusion through the endometrium
- the chorion
- the blastocyst
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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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- Describe the stages of labor.arrow_forwardDefine and describe the main features of the following developmental stages: fertilization, cleavage, gastrulation.arrow_forwardDescribe how the following components relate to the placenta: umbilical arteriescotyledons, fetal vessels,chorionic villi, intervillous space, spiral arterioles, and umbilical vein?arrow_forward
- Explain how the three germ layers are involved in forming the extraembryonic membranes, and discuss the importance of the placenta as an endocrine organ.arrow_forwardHypertension is a medical condition that can develop during pregnancy. What roles can nutrition play in preventing this disorder? What treatments, including dietary changes, can be made to prevent it from worsening? What effect does this condition have on the fetus both in utero and further in life?arrow_forwardDevin is 35 weeks pregnant with her first child when she arrives at the birthing unit reporting that she believes she is in labor. She states that she has been experiencing diffuse, mild contractions for the past few hours.Examination reveals, however, that the plug of mucus blocking her cervix is intact and her cervix has not yet begun to dilate. She is advised to return home. Why?arrow_forward
- Identify one disease, one drug, and an environmental hazard that is known to negatively impact prenatal development. Be sure to describe the specific impact of each teratogen.arrow_forwardDescribe the process of ovulation, the hormone involved and what is released into the Fallopian tube (It isn’t just the oocyte) . At what stage of meiosis is the secondary oocyte? What is the life expectancy of the secondary oocyte?arrow_forwardHow can the decisions women make during pregnancy impact the health of their developing offspring? Identify the structure responsible for the passage of materials between mother and child during pregnancy and the process for how this exchange takes place.arrow_forward
- Name the three stages of labor.arrow_forwardIdentify the major changes to foetal development that occur during the 2nd and 3rd trimesters of pregnancy. For each trimester, take into consideration Organ system development, changes to the skin surface of the foetus, Trimester length, the size of the foetus by the end of these trimesters.arrow_forward
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