Lecture 2

Question 1

Reproductive cells

Answer 1

Gametes

Question 2

Fertilized ovum

Answer 2

zygote

Question 3

Typical cells have ___ chromosomes

Answer 3

46

Question 4

Gametes have ___ chromosomes

Answer 4

23

Question 5

Single sperm cell penetrates the outer coating of the egg and fuses to form one fertilized cell

Answer 5

Conception

Question 6

What are the 3 parts of prenatal development?

Answer 6

germinal, embryonic, fetal

Question 7

0-2 weeks; point when developing organism attaches to wall of uterus

Answer 7

Germinal

Question 8

2-8 weeks; implantation until point when all major organs take primitive shape

Answer 8

Embryonic

Question 9

9 weeks- birth; begins with first signs of hardening bones

Answer 9

Fetal

Question 10

Where does the zygote go through before attaching to the walls of the uterus?

Answer 10

Fallopian tube

Question 11

Outer group of cells

Answer 11

Placenta

Question 12

Inner group of cells

Answer 12

Embryo

Question 13

Zyogote once cells start to separate

Answer 13

blastocyst

Question 14

outer layer of embryo, outer skin, eye lens, inner ear, nervous system

Answer 14

ectoderm

Question 15

inner layer, digestive system and lungs

Answer 15

endoderm

Question 16

Middle layer, bones, muscle, circulator system

Answer 16

Mesoderm

Question 17

Form head to tail

Answer 17

Cephalocaudal

Question 18

From center of body outward

Answer 18

Proximodistal

Question 19

___ week sex organs become visible

Answer 19

12th

Question 20

____ month lower limbs develop, ear migrate

Answer 20

4th month

Question 21

___ month all neurons are produced

Answer 21

5th

Question 22

___ month lungs are capable of breathing air

Answer 22

7th

Question 23

___ months the fetus has a much better chance of survival

Answer 23

7

Question 24

___ weeks embryo is capable of responding to direct stimulation

Answer 24

8

Question 25

___ weeks generalized movement

Answer 25

10

Question 26

___ weeks fetus is capable of all movements seen in newborns

Answer 26

15

Question 27

Why does fetal activity decrease at 6-8 months?

Answer 27

No space

Question 28

___ weeks fetal sense of touch

Answer 28

8

Question 29

___ months fetal sense of smell and taste

Answer 29

4-5

Question 30

_____ months fetal sense of balance/motion

Answer 30

5-6

Question 31

____ months fetal sense of audition

Answer 31

6

Question 32

___ months fetal sense of vision

Answer 32

7

Question 33

What are 3 factors that affect prenatal development negatively?

Answer 33

attitude, maternal malnutrition, teratogens

Question 34

What is associated with spontaneous abortions, still births, and defects?

Answer 34

Malnutrition

Question 35

What are some examples of teratogens?

Answer 35

Drugs, AIDS, environmental toxins

Question 36

What can teratogens cause during pregnancy?

Answer 36

Prenatal physical/mental abnormalities

Question 37

Chemicals or viruses that can enter the placenta and harm the developing fetus

Answer 37

Teratogens

Question 38

Why is the unborn child most vulnerable during the embryonic period?

Answer 38

Major organs are being formed and can hinder the development

Question 39

Genetic material is passed on as ____

Answer 39

chromosomes

Question 40

Sections of DNA that are functional

Answer 40

Genes

Question 41

Complete set of genes

Answer 41

Genotype

Question 42

Observable physical and psychological characteristics

Answer 42

Phenotype

Question 43

What creates your phenotype?

Answer 43

Genotype interacting with the environment

Question 44

Largely controls the continuous switching on and off of genes

Answer 44

Regulatory genes

Question 45

Genetic makeup establishes a range of possible outcomes, environmental forces largely influence how an individual develops

Answer 45

Range of reaction

Question 46

Conditions and circumstances that surround an individual

Answer 46

Environment