Chapter 3 Review Flashcards Preview

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Flashcards in Chapter 3 Review Deck (21):
1

Fetal portion of placenta

Chorion

2

Formation of three primary germ layers

Gastrulation

3

Gives rise to most of urinary system

Intermediate mesoderm

4

Single cell produced by fertilization

Zygote

5

Fluid filled membranous sac around fetus

Amnion

6

Forms brain and spinal cord

Neural tube

7

Structure that implants in the uterus

Blastocyst

8

Forms muscle and the axial skeleton

Paraxial mesoderm

9

Solid ball of cells during cleavage

Morula

10

Cell layer facing yolk sac in bilaminar germinal disc

Hypoblast

11

Fertilization of the secondary oocyte usually occurs in the

Uterine tube

12

The outer layer of the blastocyst that attaches to the wall of the uterus at implantation is called the

Trophoblast

13

At about day 3 after fertilization, the cells of the pre-embryo adhere tightly to each other and increase their surface contact in a process called

Compaction

14

Somites develop from

Paraxial mesoderm

15

During gastrulation, cells from the ____ layer of the bilaminar germinal disc migrate and form the three primary germ layers

Epiblast

16

An abnormal number of chromosomes in a cell following meiosis occurs as a result of

Nondisjunction

17

The cells of the embryoblast differentiate into the ____ and the ______

Epiblast, hypoblast

18

Is the mesoderm an extraembryonic membrane?

No

19

Capacitation occurs when sperm

Are deposited within the female reproductive tract

20

The beginning of brain and spinal cord formation is termed

Neurulation

21

Describe "crossing over"

Crossing over helps shuffle the genetic material between maternal and paternal chromosomes in the cell. Moving genetic material between these chromosomes forms genetically diverse sex cells that have the potential to produce a human being with its own unique array of traits