LooseLeaf for Human Anatomy
5th Edition
ISBN: 9781259285271
Author: Michael McKinley Dr., Valerie O'Loughlin, Elizabeth Pennefather-O'Brien
Publisher: McGraw-Hill Education
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Question
Chapter 3, Problem 3MC
Summary Introduction
Introduction:
The embryonic period initiates with the establishment of the primary germ layers. The formation of germ layers is called gastrulation. After gastrulation, organogenesis occurs through which the basic structure of all organs are formed.
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Of the following processes, which occurs last during embryonic development?a. cleavageb. neurulationc. gastrulationd. fertilization
The formation of three germ layers is called
Select one:
a. gastrulation
b. pluripotency
c. differentiation
d. neurulation
At about day 3 after fertilization, the cells of the pre-embryoadhere tightly to each other and increase their surface contact ina process calleda. implantation.b. compaction.c. gastrulation.d. neurulation.
Chapter 3 Solutions
LooseLeaf for Human Anatomy
Ch. 3 - What are two ways in which meiosis differs from...Ch. 3 - What is crossing over, and during what phase of...Ch. 3 - Prob. 3WYLCh. 3 - Prob. 4WYLCh. 3 - How is a secondary oocyte different from an ovum?Ch. 3 - Prob. 6WYLCh. 3 - What is the name of the core of cells at one end...Ch. 3 - Prob. 8WYLCh. 3 - Prob. 9WYLCh. 3 - What structure induces the process of neurulation?
Ch. 3 - Prob. 11WYLCh. 3 - What structures in the embryo are derived from the...Ch. 3 - Prob. 13WYLCh. 3 - Prob. 14WYLCh. 3 - Match each numbered item with the most closely...Ch. 3 - Prob. 1MCCh. 3 - The outer layer of the blastocyst that attaches to...Ch. 3 - Prob. 3MCCh. 3 - Somites develop from. a. paraxial mesoderm b....Ch. 3 - Prob. 5MCCh. 3 - An abnormal number of chromosomes in a cell...Ch. 3 - Prob. 7MCCh. 3 - Which of the following is not an extraembryonic...Ch. 3 - Prob. 9MCCh. 3 - The beginning of brain and spinal cord formation...Ch. 3 - Briefly describe the process of meiosis,...Ch. 3 - Prob. 2CRCh. 3 - Prob. 3CRCh. 3 - Prob. 4CRCh. 3 - What important event occurs with the formation of...Ch. 3 - Prob. 6CRCh. 3 - Prob. 7CRCh. 3 - Prob. 8CRCh. 3 - Prob. 9CRCh. 3 - Prob. 10CRCh. 3 - Jennifer is a 37-year-old woman who is just over 3...Ch. 3 - In the late 1960s, a number of pregnant women in...Ch. 3 - Prob. 3DCR
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- Define and describe the main features of the following developmental stages: fertilization, cleavage, gastrulation.arrow_forwardGastrulation does NOT Select one: a. involve the formation of germ layers b. consist of endoderm, mesoderm, and ectoderm c. result in the formation of a third layer in the embryonic disk d. include the differentiation of cells into tissues and organsarrow_forwardComponent of bilaminar germ disc: a.Hypoblast and endoderm b.Epiblast and hypoblast c.Epiblast and ectoderm d.Ectoderm and mesodermarrow_forward
- Which of the following stages of the fertilization process stimulates completion of meiosis II in the oocyte’s nucleus? A. The sperm nucleus and egg nucleus combine to form the genetic material of the zygote B. Sperm release enzymes to digest the protein layer of the secondary oocyte C. The entry of a sperm into the secondary oocyte D. The swimming of sperm from the vagina, through the uterus, and up to an oviductarrow_forwardWhat happens to the embryo after week 8? Select one: a. All organ formation has completed, so the fetus begins to grow in size through mitosis. b. Umbilical cord and placenta begins to form. c. All other organs such as kidneys, bladder, liver, lungs, and spleen begin to form. d. Tissue and organ differentiation from the endoderm and mesoderm finalize at the end of the second trimester.arrow_forwardWhich of the following statement does NOT describe the event that occurs if the ovum is not fertilized? Select one: A. Progesterone maintains the endometrium for the zygote. B. Low level of progesterone results in menstruation. C. The corpus luteum degenerates and stops producing estrogen and progesterone. D. GnRH, FSH, and LH levels begin to increase.arrow_forward
- Which of the following is false? a. The endoderm, mesoderm, ectoderm are germ layers. b. The trophoblast is a germ layer. c. The inner cell mass is a source of embryonic stem cells. d. The blastula is often a hollow ball of cells.arrow_forwardOogenesis involves germ cells in the ovary undergoing meiosis to produce a functional ovum at the end of the process.Which of the following cells is penetrated by a sperm cell during the process of fertilization? Select one: a. Secondary oocyte b. Oogonia c. Primary oocyte d. Ovumarrow_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_forward
- A gastrulation does NOT Select one: A. Consist of endoderm, mesoderm, and ectoderm B. Result in the formation of a third layer in the embryonic disc C. Involve the formnation of germ layers D. Include the differentiation of cells into tissues and organsarrow_forwardWhich of the following statements does NOT describe the events that occur if the ovum is not fertilized? Select one: a. The corpus luteum degenerates and stops producing estrogen and progesterone. b. GnRH, FSH, and LH levels begin to increase. c. Progesterone maintains the endometrium for the zygote. d. Low levels of progesterone result in menstruation.arrow_forwardWhich of the following statements about oocytes and ovulation is correct? a. The production of primary oocytes continues in women from the onset of puberty until the onset of menopause. b. Meiotic divisions are complete at the time of ovulation. c. At ovulation, the structure released from the follicle includes a secondary oocyte and polar body. d. All of these statements are correctarrow_forward
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Embryology | Fertilization, Cleavage, Blastulation; Author: Ninja Nerd;https://www.youtube.com/watch?v=8-KF0rnhKTU;License: Standard YouTube License, CC-BY