Biology: Life on Earth with Physiology Plus Mastering Biology with Pearson eText -- Access Card Package (11th Edition)
11th Edition
ISBN: 9780133910605
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: PEARSON
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Question
Chapter 43.5, Problem 1TC
Summary Introduction
To determine:
What happens before the blastocyst can implant in the uterus.
Introduction:
Fertilization is a process in which haploid male gamete (sperm) fuses with the haploid female gamete (egg or ovum) that result in the formation of diploid zygote. The zygote then further develops into an embryo.
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Chapter 43 Solutions
Biology: Life on Earth with Physiology Plus Mastering Biology with Pearson eText -- Access Card Package (11th Edition)
Ch. 43.1 - define development and describe how cell division...Ch. 43.2 - Prob. 1CYLCh. 43.3 - describe early development in amphibians,...Ch. 43.3 - Prob. 2CYLCh. 43.4 - Prob. 1TCCh. 43.4 - Prob. 2TCCh. 43.4 - Prob. 1CYLCh. 43.4 - Prob. 2CYLCh. 43.4 - Does the development of a human limb, and the rest...Ch. 43.5 - Prob. 1TC
Ch. 43.5 - Prob. 1CSCCh. 43.5 - Prob. 1ETCh. 43.5 - Prob. 2TCCh. 43.5 - Prob. 1HYEWCh. 43.5 - describe human embryonic development from...Ch. 43.5 - describe the structure and function of the...Ch. 43.5 - Prob. 3CYLCh. 43.6 - Prob. 1TCCh. 43.6 - Prob. 1CYLCh. 43.6 - Prob. 2TCCh. 43 - Prob. 1MCCh. 43 - Animals with Indirect development a. develop...Ch. 43 - Prob. 3MCCh. 43 - Prob. 4MCCh. 43 - Prob. 5MCCh. 43 - Prob. 1FIBCh. 43 - Prob. 2FIBCh. 43 - Prob. 3FIBCh. 43 - Prob. 4FIBCh. 43 - Prob. 1RQCh. 43 - Describe the structure and function of the four...Ch. 43 - What is gastrulation? Describe gastrulation in...Ch. 43 - Prob. 4RQCh. 43 - Prob. 5RQCh. 43 - In humans, where does fertilization occur, and...Ch. 43 - Prob. 7RQCh. 43 - Prob. 8RQCh. 43 - How do changes in the breast prepare a mother to...Ch. 43 - Prob. 1ACCh. 43 - Prob. 2AC
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- What is the developmental fate of the inner cell mass of the blastocyst?arrow_forwardWhat is the purpose of the placenta? Which part of the blastocyst eventually becomes the fetal placenta? In birds, developing chicks rely on the yolk sac to provide essential nutrients, but in humans, this is not the case. Why don’t we need it to provide nutrition? What is amniocentesis? How is it done?arrow_forwardWhich of the following is required for successful fetal development after the egg has been fertilized? a) That the corpus luteum remains throughout the pregnancy b) Production of estrogen (estradiol) and progesterone from the placenta c) Release of hCG (human chorionic gonatotropin) from the placentaarrow_forward
- Why is it concerning for a fertilized egg to implant outside of the uterus?arrow_forwardIf fertilization occurs, the corpus luteum continues to produce hormones under the direction of Human Chorionic Gonadotrophin (HCG), which is produced by the embryo. By the third month, what begins to produce estradiol and progesterone?arrow_forwardOutline the postfertilization events that lead to formation of a blastocyst.arrow_forward
- Which of the following statements does NOT correctly describe the events following fertilization? Select one: a. Only the inner cell mass cells in a blastocyst are pluripotent. b. The trophoblast has an important role in maintaining the pregnancy, as it prevents the endometrium from shedding. c. As hCG takes over maintaining the endometrium immediately after implantation, the corpus luteum degenerates into the corpus albican. d. All 16 cells in a morula are truly totipotent, meaning that they can become any cells in the human body.arrow_forwardAfter fertilization the blastocyst develops three germ layers. Which germ layer is the innermost layer?arrow_forwardWhat is the fate of the inner cell mass? Which of the structures produces human chorionic gonodotropin (HCG)? What is the function of HCG? What would happen to the implanted blastocyst if HCG were not secreted?arrow_forward
- How does a morula differ from a blastocyst?arrow_forwardA friend in your dormitory, a freshman, tells you that she just discovered she is 3 months pregnant. You know that since she came to college she has been experimenting with recreational drugs. Circle the best advice you could give her, and explain your choice. (a) She must stop taking the drugs, but they could not have affected her fetus during these first few months of her pregnancy. (b) Harmful substances usually cannot pass from mother to embryo, so she can keep using drugs. (c) There could be defects in the fetus, so she should stop using drugs and visit a doctor as soon as possible. (d) If she has not taken any drugs in the last week, she is OK.arrow_forwardState the levels of FSH, LH and Progesterone simply by mentioning high or low around 13th and 14th day and 21st to 23rd day.(ii) In which of the above mentioned phases does egg travel to fallopian tube?(iii) Why there is no mensuration after fertilisation?arrow_forward
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