Ch 17 Practice Flashcards Preview

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Flashcards in Ch 17 Practice Deck (32):
1

What is the purpose of an episiotomy?

To enlarge the vaginal orifice during child birth

2

The structure that connects the embryo to the placenta is called the ______ ______.

Umbilical cord

3

What developments occur during the first 5 years of childhood development?

• Development of gross fine motor skills
• Maturation of senses
• Development of speech

4

Pre-embryonic period

Egg is fertilized by sperm; zygote begins to divide

5

Embryonic period

Weeks 2-8; Implantation occurs; nervous system, limb buds, and all other systems are developing

6

Fetal period

Third - ninth month; organ systems complete development

7

During animal development the three embryonic ______ layers develop into the different organs and tissues.

Germ

8

List the events of fertilization:

1. Sperm penetrate the corona radiata
2. Sperm release acrosomal enzymes
3. Sperm binds to oocyte plasma membrane
4. Sperm pronucleus forms
5. Sperm and egg pronuclei enclosed in nuclear envelope

9

The study of aging is called ______.

Gerontology

10

______ is the embedding of the embryo within the lining of the uterus.

Implantation

11

Fertilization occurs when sperm and the egg unite to form the first cell of a new individual, called the ______.

Zygote

12

BY the tenth week of embryonic development, the chorion has developed into the ______, which is now secreting hormones that help maintain the pregnancy.

The placenta

13

The ______ provides the developing embryo/fetus with nourishment and oxygen and takes away its waste.

Placenta

14

Sperm require lots of energy and this is generated from the mitochondria located within the ______.

Middle piece

15

Identify the three layers of tissue formed during gastrulation:

• Endoderm (inner layer)
• Mesoderm (middle layer)
• Ectoderm (outer layer)

16

The events of the first week after fertilization encompass ______.

Pre-embryonic development

17

The presence of hormones produced by the ______ ______ after implantation prevent menstruation.

Corpus Luteum

18

By the tenth week of embryonic development, the chorion has developed into the ______, which is now secreting hormones that help maintain the pregnancy.

Placenta

19

During the ______ process of development cells take on a specific structure and function.

DIfferentiation

20

The gene on the Y chromosome that induces development of male genetalia is called the ______ gene.

SRY

21

Growth

During embryonic development, cell division is accompanied by an increase in size of the daughter cells

22

Morphogenesis

The shaping of the embryo that is evident when certain cells migrate in relation to other cells

23

Differentiation

When cells take on specific structure and function

24

Cleavage

The first cell divisions that occur immediately after fertilization

25

Membranous areas in the skull that permit flexibility for passing through the birth canal and rapid growth of the brain during infancy are called ______.

Fontanels

26

The middle germ layer of an animal embryo that gives rise to muscle, several internal organs, and connective tissue layers is the:

Mesoderm

27

During which stage of the birthing process does the cervix dilate?

First stage

28

Child birth is regulated by a ______ feedback mechanism.

Positive

29

A pregnancy in which the embryo implants in a location other than the uterus is called a(n) ______ pregnancy.

Ectopic

30

Progesterone

Relaxation of smooth muscle; reduced uterine motility

31

Estrogen

Increased uterine flow; increased RAA activity and protein synthesis by the liver

32

Peptide hormone

Increased insulin resistance