Unit 1

Question 1

Define oogonia

Answer 1

Diploid cells, enlarge to form primary oocytes before birth

Question 2

Most succeptable to tertogens

Answer 2

3 to 8 weeks or embryological period

Question 3

During the first month of birth the baby is consider to be a

Answer 3

Neonates

Question 4

Study of abnormal development

Answer 4

Teratology

Question 5

Toward the head

Answer 5

Cranial

Question 6

Relating to cavity lining

Answer 6

Parietal

Question 7

Relating to the covering of organs

Answer 7

Visceral

Question 8

To the tail

Answer 8

Caudal

Question 9

To the belly

Answer 9

Ventral

Question 10

To the back

Answer 10

Dorsal

Question 11

Time of fertilization forms this from male and female gametes

Answer 11

zygote

Question 12

Occurs in females

Answer 12

Oogenesis

Question 13

Occurs in males

Answer 13

Spermatogenesis

Question 14

Cell division resulting in a full replication of chromosomes

Answer 14

Mitosis, results in diploid cells (46 chromosomes)

Question 15

Meisosis involving 2 cells divisions and results in half of the chromosome count.

Answer 15

23 chromosomes. Haploid

Question 16

Crossover occurs

Answer 16

Chiasma

Question 17

Oogenesis

Answer 17

Process by which mature oocytes are produced

Question 18

Diploid cells enlarge to form primary oocytes before birth

Answer 18

Oogonia

Question 19

Release of the oocyte from its ovarian follicle

Answer 19

Ovulation

Question 20

Transport oocytes from the ovary to the uterus through ciliary action and muscular contraction

Answer 20

Takes 3 to 4 days

Question 21

Place of fertilization

Answer 21

In the ampulla

Question 22

Produced in the hypothalamus and passed to the anterior pituitary gland via the hypophyseal portal system

Answer 22

GnRH

Question 23

GNRH stimulates these 2 hormones via anterior pituitary

Answer 23

FSH - stimulates ovarian follicles and estrogen secretion

LH - initiates ovulation

Question 24

Number of Primary follicles begin to mature each month

Answer 24

5 to 12

Question 25

Triggers ovulation

Answer 25

LH where a secondary oocyte is released

Question 26

If fertilization occurs

Answer 26

Corpus lueteum enlarges and an increase in output of progesterone and estrogen

Question 27

If fertilization does not occur

Answer 27

Corpus lueteum involves 10 to 12 days after ovulation and is replaced by a scar called a corpus albicans

Question 28

Endometrium sloughs off (4 to 5 days)

Answer 28

Menstrual phase

Question 29

Ovulation occurs when?

Answer 29

Around midpoint of of the menstrual cycle (day 14)

Question 30

When fertilization does not occur, a steep decline of hormones levels cause the endometrial glands to slough off. - phase?

Answer 30

Ischemic phase

Question 31

Temporary neutiralizearion of vaginal acidity to allow survival of sperm to live

Answer 31

Cause by seminal vesicles that produce the sperm

Question 32

Causes ejaculation

Answer 32

Contraction of the bulbospongiosus

Question 33

Sperm are nourished by

Answer 33

Fructose in seminal fluid

Question 34

Sperms ability to fertilize following ejaculation

Answer 34

Not immediate

Question 35

How long is the maturation of sperm within the the isthmus of the uterine tube known as

Answer 35

7 hours, capacitation

Question 36

Perforated of the acrosome that occur when a capacitated comes in contact with the Corona radiate surrounding a secondary oocyte

Answer 36

Acrosome reaction

Question 37

Most common place of fertilization

Answer 37

Ampulla of uterine tubes

Question 38

Penetration occurs via

Answer 38

Corona radiata

Question 39

Penetration of the sperm through the due to acrosome. 2nd layer

Answer 39

Zona reaction

Question 40

Once the zona pollucida is penetrated by a sperm, a reaction occurs which makes in impermeable to other sperms

Answer 40

Zona reaction

Question 41

Formation of the male proneucleus

Answer 41

Through the enlargement of the sperm.

Question 42

Oocyte containing the 2 infused pronuckei is called the

Answer 42

Ootid

Question 43

The zygote undergoes

Answer 43

A series of mitotic divisions

Question 44

Zygote turns to a

Answer 44

Blastomere

Question 45

The zygote enters the uterus, the blastimrere divide again to form the what? How long

Answer 45

16 cell morula, 3 days after fertilization

Question 46

Morula consists of

Answer 46

Inner cell mass | Outer cell mass

Question 47

Inner cell mass

Answer 47

Gives rise to tissues of the embryo

Question 48

Outer cell mass

Answer 48

Gives rise to trophoblast

Question 49

Embryonic stem cells are

Answer 49

Derived from the inner cell mass

Question 50

Embryonic stem cells are

Answer 50

Pluripotent

Question 51

Adult stem cells are

Answer 51

Multi potent

Question 52

Cleavage of the zygote occurs when

Answer 52

Day 3

Question 53

Blostocyst formation

Answer 53

Day 4

Question 54

When does the blastocystic cavity develop

Answer 54

Day 4

Question 55

Blastocystic development in the morula is known as

Answer 55

Blastocyst

Question 56

Outer cell mass comes from

Answer 56

Trophoblast

Question 57

Outer cell mass becomes a

Answer 57

Trophoblast

Question 58

When does the zona pollucida disappear

Answer 58

During blastocyst formation