Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Chapter 46, Problem 17TYK
Summary Introduction
Introduction: During the process of embryonic development, the zygote undergoes multiple divisions to give rise to the embryo. The embryo undergoes several divisions to mature into the adult organism. The gastrula has three germ layers, namely ectoderm, mesoderm, and ectoderm.
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Identify a characteristic of a fetus in the sixth month of gestation.
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Chapter 46 Solutions
Study Guide for Campbell Biology
Ch. 46 - a. What adaptive advantages may asexual...Ch. 46 - Prob. 2IQCh. 46 - Prob. 3IQCh. 46 - Prob. 4IQCh. 46 - Fill in the blanks in the following description of...Ch. 46 - In the following diagram of the human female...Ch. 46 - Prob. 7IQCh. 46 - Prob. 8IQCh. 46 - Prob. 1SYKCh. 46 - Answer the following questions concerning the...
Ch. 46 - Prob. 3SYKCh. 46 - Prob. 1TYKFCh. 46 - Prob. 2TYKFCh. 46 - Prob. 3TYKFCh. 46 - Prob. 4TYKFCh. 46 - ______ common opening of digestive, excretory, and...Ch. 46 - Prob. 6TYKFCh. 46 - Prob. 7TYKFCh. 46 - Prob. 8TYKFCh. 46 - Prob. 9TYKFCh. 46 - Prob. 10TYKFCh. 46 - Prob. 1TYKCh. 46 - Prob. 2TYKCh. 46 - Prob. 3TYKCh. 46 - Prob. 4TYKCh. 46 - Prob. 5TYKCh. 46 - Prob. 6TYKCh. 46 - Which of the following statements correctly...Ch. 46 - What is the role of the corpus luteum in...Ch. 46 - The secretory phase of the uterine cycle a. begins...Ch. 46 - Prob. 10TYKCh. 46 - Prob. 11TYKCh. 46 - Choose from the following hormones to answer...Ch. 46 - Prob. 13TYKCh. 46 - Prob. 14TYKCh. 46 - Prob. 15TYKCh. 46 - Prob. 16TYKCh. 46 - Prob. 17TYK
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- Months pass as Ashley has an uneventful pregnancy. Eventually, Ashley goes into labor and arrives at the hospital to give birth. As Ashley progresses through the first stage of labor, all of the following occur except a. the fetus’s head pushes against the cervix, promoting the cervical dilation. b. oxytocin levels decrease as labor progresses. c. the amniotic sac may rupture. d. contractions become more frequent and more intense.arrow_forwardUntreated chlamydia and gonorrhea can lead to pelvic inflammatory disease in women. Pelvic inflammatory disease (PID) can cause a buildup of scar tissue on the Fallopian tubes.Women affected with PID can become infertile because Select one: a. the ovum cannot be swept into the Fallopian tube b. the ovaries cannot secrete the necessary hormones to support an embryo c. the fertilized egg cannot implant on the endometrium d. sperm is blocked from entering the Fallopian tubes to fertilize the eggarrow_forwardDuring the first trimester, hCG produced from the chorion maintains the corpus luteum. What is the purpose of maintaining the corpus luteum? Select one: a. The corpus luteum produces relaxin, which thickens the endometrium. b. The corpus luteum ensures that the endometrium does not break down during the first trimester. c. The corpus luteum supports the formation of the placenta. d. The chorion forms the fetal part of the placenta, and the corpus luteum supports the maternal part of the placenta.arrow_forward
- Which of the following is not a mechanism on how contraceptive pills work to prevent pregnancy? A. thinning the endometrium to prevent implantation B. inhibition of follicular development and suppression of ovulation C. progesterone inhibits the sperm from penetrating through the cervix and female upper tract by making the cervical mucus unfriendly D. stimulates the production of high testosterone levelsarrow_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_forwardSuperovulation is when women take hormones in order to release more eggs for fertilization. Which of the following rows contains hormones that are involved in developing the follicles and releasing them from the ovary, respectively? What could be the unintended consequence of this process? Select one: a. Hormone Unintended Consequence FSH and LH The formation of twins or multiple births b. Hormone Unintended Consequence FSH and LH A tubal ligation c. Hormone Unintended Consequence FSH and LH Scar tissue on the Fallopian tubes d. Hormone Unintended Consequence LH and FSH Ovarian Cancerarrow_forward
- 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 veinsarrow_forwardA woman has been diagnosed with a ruptured ectopic pregnancy. Which of the following signs/symptoms is characteristic of this diagnosis? A. Dark brown rectal bleeding. B. Severe nausea and vomiting. C. Sudden lower quadrant pain earlier in the pregnancy. D. Marked hyperthermia.arrow_forwardIn general, the greatest vulnerability to teratogens occurs during: Group of answer choices the last part of the fetal period of prenatal development. A the embryonic period of prenatal development. B the zygotic period of prenatal development. C the germinal period of prenatal development. Darrow_forward
- How do tubal ligations and vasectomies prevent further pregnancies? Select one: a. The corpus luteum and the epididymis are suppressed using a chemical swab. The fertilized egg could no longer implant in the endometrium. b. The Fallopian tubes and vas deferens are cut and tied off, thereby preventing the movement of the eggs and sperm. c. The Fallopian tubes and the vas deferens are cut. Eggs and sperm can no longer be produced. d. The Fallopian tube and vas deferens are cut and tied off, thereby reducing needed reproductive hormone levels.arrow_forwardWhat is the difference between in vitro fertilization (IVF)and artificial insemination? Select one: a. IVF involves fertilization outside the body, whereas artificial insemination involves internal fertilization. b. During IVF, gametes are introduced into the womb, whereas during artificial insemination, a blastocyst is implanted on the uterus. c. IVF includes giving the woman additional FSH and LH to induce superovulation, whereas artificial insemination involves a woman undergoing any hormonal treatment. d. Artificial insemination can be used during a surrogacy, whereas IVF cannot.arrow_forwardWhich of the following rows identifies structures responsible for maintaining the endometrium before and after implantation? Select one: a. Before Implantation After Implantation Corpus luteum Placenta b. Before Implantation After Implantation Maturing follicle Placenta c. Before Implantation After Implantation Corpus luteum Trophoblast d. Before Implantation After Implantation Maturing follicle Trophoblastarrow_forward
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