Embryo-1

Question 1

The 16-cell stage makes what?

Answer 1

Morula

Question 2

Fertilization occurs where and is the most common site of an ectopic pregnancy?

Answer 2

ampulla

Question 3

The secondary oocyte has a ________ that makes the oocyte distinguished

Answer 3

antrum

Question 4

Sperm releases acrosomal enzymes upon touching what structure?

Answer 4

Zona Pellucida

Question 5

syncytiotrophoblast and cytotrophoblast are made from what?

Answer 5

trophoblasts

Question 6

What is the average length of pregnancy?

Answer 6

37-42 weeks

Question 7

Proliferative phase is days 6-14, it is under influence of __________

Answer 7

estrogen, proliferation of endometrium, formation of glands/arteries

Question 8

Oocyte are formed during the fifth month of fetal development and remain dormant in what cell phase?

Answer 8

Prophase I of meiosis

Question 9

Menstrual phase is days 1-5, causes an increase of what?

Answer 9

blood, bleeding

Question 10

After the pronuclei are formed, two individual cells make _________ which are totipotent

Answer 10

blastomeres

Question 11

What is the process where different layers are removed from the head of the sperm?

Answer 11

Capacitation

Question 12

What layer of the oocyte prevents polyspermy, premature implantation, disintegration of cleaving embryo?

Answer 12

Zona Pellucida

Question 13

Organogenesis happens during weeks _________, in the embroyonic period

Answer 13

3-8

Question 14

Before the embryo implants into the posterior superior wall, what must be shed?

Answer 14

Zona pellucida

Question 15

Spermatogonia -> __________ -> spermatids

Answer 15

spermatocytes

Question 16

Where are primordial germ cells formed?

Answer 16

Epiblast

Question 17

Zona Pellucida allows nutrients to reach cleaving embryo and causes _________ development

Answer 17

Blastocyst

Question 18

Spermatogonia moves through what process to make type A and type B spermatogonia?

Answer 18

Mitosis

Question 19

Ovulation is caused by an increase of what?

Answer 19

LH

Question 20

Secretory phase is under the influence of __________

Answer 20

progesterone, arteries and glands enlarge

Question 21

During what process do primordial germ cells move through the primitive streak?

Answer 21

Gastrulation, eventually settle in the yolk sac

Question 22

Blastomeres undergo compaction after 8-cell stage, that make what two pieces?

Answer 22

trophoblasts-> make the placenta embryoblasts -> inner cell mass

Question 23

Spermatocytogensis is what process?

Answer 23

Spermatogonia to spermatids

Question 24

The corpus luteum degenerates due to the lack of what of hormone?

Answer 24

Progesterone

Question 25

When implantation occurs in lower parts of uterus towards the cervix, what is this called?

Answer 25

Placenta previa

Question 26

Spermatids to spermatoza?

Answer 26

Spermiogenesis

Question 27

Follicle maturation is regulated by what hormone?

Answer 27

FSH

Question 28

What is the disease pictured?

Answer 28

¨Sacrococcygeal teratoma – clusters of pluripotent cells proliferate and form tumors in the region

Question 29

What is the disease pictured?

Answer 29

Proboscis: single nasal opening formed by fusion of lateral nasal processes

Question 30

What is the disease pictured?

Answer 30

Rachischisis: failure of neurulation; i.e., the neural tube does not close

Question 31

What is this disease?

Answer 31

Anencephaly

Question 32

What is the disease and the part of the neural tube that didnt close?

Answer 32

Spina bifida: failure of posterior neuropore closure