Fertilization

Question 1

What surrounds oocyte

Answer 1

Follicular cells

Question 2

What do the follicular cells secrete?

Answer 2

Oestrogen

Question 3

What does ovulation directly stimulated by?

Answer 3

LH

Question 4

What does the corpus luteum secret?

Answer 4

Oestrogen and progesterone

Question 5

What is the proper name for the eggs so when it is ovulated?

Answer 5

Secondary oocyte

Question 6

What is the most important function function of oestrogen and progesterone?

Answer 6

To prepare the uterine wall, called endometrium for pregnancy

Question 7

What is corpus albicans

Answer 7

This is when the corpus luteum disintegrates, and becomes a tiny scar

Question 8

What does the corpus luteum need to survive?

Answer 8

LH

Question 9

What does oestrogen stimulate specifically?

Answer 9

The LH surge promoting the growth of the uterine lining

Question 10

What does progesterone stimulate specifically?

Answer 10

It keeps pregnancy

Question 11

What does hCG do?

Answer 11

Prevents corpus luteum from breaking down and is secreted in urine when pregnant

Question 12

What are the follicular cells around the egg called at ovulation

Answer 12

Corona radiata

Question 13

What does the corona radiata do?

Answer 13

Forms barrier between egg and sperm, because we only want one to fertilize

Question 14

What are the three layers of a secondary oocyte

Answer 14

Egg plasma membrane
Vitaline layer
Zona, pellucida gel

Question 15

What is the fast block when the sperm meets the egg?

Answer 15

The sperm cell an egg cell fuse

Question 16

What is the slow block when the sperm meets the egg?

Answer 16

Cortical granules are released from egg to enter space to block

Question 17

How many chromosomes do you want in a zygot

Answer 17

46

Question 18

What is the fertilized egg called from the weeks 0 to 8?

Answer 18

An embryo

Question 19

What is the fertilized egg called after eight weeks

Answer 19

Foetus

Question 20

After fertilization takes place, the zygote divides by mitosis but does not gain overall size. This is called:

Answer 20

Cleavage

Question 21

Name of embryonic structure that has 3 germ layers

Answer 21

Gastrula

Question 22

Name of embryonic structure that implants into endometrium

Answer 22

Blastocyst

Question 23

Name of embryonic structure that implants into endometrium

Answer 23

Blastocyst

Question 24

What is the proper name for a 8-celles embryonic structure

Answer 24

Morula

Question 25

What hormone is secreated by blastocyst

Answer 25

HCG

Question 26

What are the three functions of amniotic sac

Answer 26

1. Protection 2. Keep from dehydration 3. Maintain body temp

Question 27

What produces red blood cells for embryo

Answer 27

Yolk sac

Question 28

Name three germ layers

Answer 28

Ectoderm, endoderm, mesoderm

Question 29

Wich germ layer develops into the nervous system

Answer 29

Ectoderm

Question 30

What does ectoderm layer affect

Answer 30

Skin, hair, mouth, sweat glands, nervous system, brain, eyes

Question 31

Mesoderm structures

Answer 31

Muscles, skeleton, circulatory system, heart, gonads

Question 32

Endoderm structures

Answer 32

Organs, lining of digestive tract, respiratory

Question 33

What is the hat of the sperm called

Answer 33

Acrosome

Question 34

If HCG is high, how are the other hormones affected

Answer 34

Progesterone and oestrogen secretions are also high

Question 35

What is chorionic villi?

Answer 35

Fingerlike projections that bind with endometrium wall

Question 36

What will the amnion form into?

Answer 36

The fluid filled sac, call amniotic sac

Question 37

What is the allantois responsible for?

Answer 37

Blood vessel development in the umbilical cord

Question 38

What is the blastocyte is developed and attached to the uterine wall what is the next stage of development called?

Answer 38

Gastrulation

Question 39

What does gastrulation form?

Answer 39

Gastrula

Question 40

What embryonic structure has the germ layers?

Answer 40

The gastrula

Question 41

What happens during the second trimester?

Answer 41

Brain grows heartbeat, a strong nervous system begins

Question 42

What happens in the third trimester?

Answer 42

Foetus doubles in size brain development

Question 43

What is the process called that produces haploid cells in humans?

Answer 43

Meiosis

Question 44

What do the Corian cells become?

Answer 44

Placenta

Question 45

What gland produces oxytocin

Answer 45

Hypothalamus

Question 46

What gland releases oxytocin

Answer 46

Posterior pituitary

Question 47

What causes uterine contractions

Answer 47

Oxytocin

Question 48

What does 1st trimester do

Answer 48

All body organ are formed, genitalia is complete

Question 49

What gland secretes HCG

Answer 49

Chorionic cells of placenta

Question 50

What is the target of HCG

Answer 50

Corpus luteum so it keeps secreating estrogen and progesterone

Question 51

What glandular cell secretes testosterone

Answer 51

Interstitial cells in testes

Question 52

What does chlamydia do

Answer 52

Build up of scar tissue in ovieduct

Question 53

What does FSH and LH do for males

Answer 53

FSH: stimulâtes production of sperm in Sertoli cells of seminiferous tubules LH: promotes testosterone production by interstitial cells

Question 54

What helps form umbilical cord

Answer 54

Allantois

Question 55

What stimulates secreation of milk and formation of milk

Answer 55

Secreation: oxytocin Formation: Prolactin

Question 56

How does birth control pills work

Answer 56

Artificial hormones mimics progesterone and stops release of FSH and LH so no ovulation