Human Biology Custom Edition
11th Edition
ISBN: 9781337631532
Author: Cecie Starr, Beverly McMillan
Publisher: Cengage Learning
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Chapter 17, Problem 1SQ
Summary Introduction
Introduction: Gestation or pregnancy is the period during which the offspring develops within the uterus of a sexually mature woman. This involves several developmental stages of the fetus. In humans, pregnancy is nearly nine months long, which is divided into three trimesters, involving several changes in the mother and the growing fetus.
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During gastrulation, cells from the _____ layer of the bilaminar germinal disc migrate and form the three primary germ layers. a. notochord b. hypoblast c. epiblast d. mesoblast
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Chapter 17 Solutions
Human Biology Custom Edition
Ch. 17 - Define and describe the main features of the...Ch. 17 - Prob. 2RQCh. 17 - Summarize the development of an embryo and a...Ch. 17 - Label the early development stages shown in the...Ch. 17 - Prob. 1SQCh. 17 - During cleavage, the _______ is converted to a...Ch. 17 - Prob. 3SQCh. 17 - Prob. 4SQCh. 17 - _________ is the gene-guided process by which...Ch. 17 - In a human zygote, the cell divisions of cleavage...
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- The cells of the embryoblast differentiate into the ______ andthe ______.a. epiblast, hypoblastb. cytotrophoblast, syncytiotrophoblastc. amnioblast, epiblastd. epiblast, cytotrophoblastarrow_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_forwardIf the gonads within an embryo produce testosterone because of the presence of a Y gene on the sex chromosome, then the ____________ will develop and the _________ will deteriorate. a. Müllerian ducts; Wolffian ducts b. Wolffian ducts; Müllerian ducts c. ovaries; testes d. testes; ovariesarrow_forward
- Which of the following structure develops into only the fetus? A. Blastocyte B. Zygote C. Trophoblast D. Inner cell massarrow_forwardThe foramen ovale causes the fetal circulatory system to bypass the ________. a. liver b. lungs c. kidneys d. gonadsarrow_forwardDuring the first 48-72 hours after birth, the breasts produce ________, a substance rich in protein and immunoglobulins which helps the baby adjust to a non-sterile environment. Group of answer choices a.endolymph b.colostrum c.meconium d.amniotic fluidarrow_forward
- Which of the following rows identifies the site of fertilization, and the hormone released when the fertilized egg implants, respectively? Select one: a. Site of Fertilization Hormone Released Fallopian tube hCG b. Site of Fertilization Hormone released Uterus hCG c. Site of Fertilization Hormone released Uterus Aldosterone d. Site of Fertilization Hormone Released Fallopian tube Aldosteronearrow_forwardWhich 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_forwardWhich of the following is NOT associated with the embryo developing into a male: a. androgen c. Müllerian ducts b. Wolffian ducts d. testosteronearrow_forward
- Match the germ layer on the right with its contribution to the tissues and organs of the embryo, on the left. v connective tissue stroma A. mesoderm v parenchymal cells, e.g., liver B. ectoderm C. mesoderm D. mesoderm E. endoderm F. endoderm vasculature v innervation v epithelium of enteric secretory duct tubes v epithelium of integumentary system G. ectoderm v elastic membranearrow_forwardIf a child develops an anterior pituitary tumour that reduces LH and FSH production,the child will _________.A. not develop gonads.B. experience delayed or disrupted puberty.C. produce excess testosterone or estrogen.D. develop secondary sexual characteristics before puberty.arrow_forwardWhich of the following does NOT aid the sperm in fertilization? a. increased mitochondria b. flageullum development c. cytoplasmic bridge d. hyaluronidase and protease e. acrosomesarrow_forward
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