Embryology Quiz 1

Question 1

What are the 4 tissue classes?

Answer 1

Epithelial, Connective, Muscular, Nervous

Question 2

How many cell types are in the body?

Answer 2

Around 200

Question 3

Histotech: name function of and steps associated with the following:

Aldehydes, Alcohol and xylene, wax, xylene, hematoxylin/eosin

Answer 3

Fixing (N-bridges), Processing (water out, alcohol out), Staining (wax out, blue/pink)

Question 4

what makes up the ground substance?

Answer 4

Extracellular matrix, water, fibrous proteins

Question 5

3 layers, 4 free surface, and 3 surface modifications of epithelia

Answer 5

simple, stratified, pseudo-stratified
cuboidal, columnar, squamous, transitional
ciliated, keratinized, microvilli

Question 6

What is metaplasia?

Answer 6

Any change - normal or abnormal

Question 7

What is Hypertrophy?

Answer 7

Getting huge - cells enlarge without adding cells

Question 8

What is hyperplasia?

Answer 8

Addition of cells

Question 9

Neoplasia

Answer 9

Bad.

Cancerous. Tumor.

Question 10

Ampulla, Blastomere, Blastocyst, Corona Radiata

Answer 10

Bend in fallopian tube ideal fertilization site, individual cells up to 16, embeds endometrial lining, lining of Oocyte

Question 11

Zona Pellucida

Answer 11

Glycoprotein shell

Question 12

Acrosome

Answer 12

Tip of sperm - type of lysosome

Question 13

Zona Rxn

Answer 13

Ca+ mediated rxn preventing polyspermy

Question 14

2nd Meiotic Division

Answer 14

After fertilization

Question 15

Pronuclei

Answer 15

1n to 2n (both male and female pronuclei)

Question 16

What occurs 30 hours post-fertilization?

Answer 16

Furrow appears signaling first mitotic division

Question 17

What does it mean when the embryo has 16 blastomeres?

Answer 17

It’s called a Morula

Question 18

What’s the cavity in a Blastocyst called?

Answer 18

Primitive Yolk sac (just water)

Question 19

Name 3 parts of the Blastocyst

Answer 19

The yolk sac, trophoblast, embryoblast

Question 20

2 Parts of the embryoblast?

How do they differ structurally?

Answer 20

Epiblast, Hypoblast

Columnar, Cuboidal

Question 21

Trophoblast differentiates into what two parts?

Answer 21

Syncitiotrophoblast and cytotrophoblast

Question 22

Where is the extraembryonic mesoderm?

Answer 22

Between the trophoblast and hypoblast

Question 23

Where does the extraembryonic (chorionic) cavity come from?

Answer 23

Extraembryonic mesodermal proliferation

Question 24

3 Layers of the Chorion?

What does it produce?

Answer 24

Extraembryonic mesoderm, cytotrophoblast, synciciotrophoblast.
hCG

Question 25

When do the trophoblast villi appear?

Answer 25

End of 3rd week

Question 26

There are three cavities in the embryo at the end of the third week. Name them largest to smallest.

Answer 26

Chorionic cavity, Yolk sac, Amniotic Cavity