Lab Practical 2

Question 1

The trophectoderm becomes the

Answer 1

Placenta

Question 2

The inner cell mass becomes the

Answer 2

Fetus

Question 3

Function of placenta

Answer 3

Protection, nutrition, respiration, hormone production

Question 4

4 types of placentas

Answer 4

Diffuse, zonary, cotyledonary, discoid

Question 5

Which species has the zonary placenta

Answer 5

Cat and dogs

Question 6

How many layers of tissue does the zonary placenta have

Answer 6

5

Question 7

How many layers does the cotyledonary placenta have

Answer 7

6

Question 8

Which species has the cotyledonary placenta

Answer 8

Cows, sheep

Question 9

Which species have the diffuse placenta

Answer 9

Pigs, horses

Question 10

How many layers does the diffuse placenta have

Answer 10

6

Question 11

How many layers does the discoid placenta have

Answer 11

3

Question 12

Which species has the discoid placenta

Answer 12

Humans and rodents

Question 13

Embryogenesis

Answer 13

Process of embryo forming and developing

Question 14

Which stage does the morula form

Answer 14

16 cell stage

Question 15

Where does blood cross over in diffuse placenta

Answer 15

Chorionic villi

Question 16

Maternal side of placenta in pigs

Answer 16

Rugae

Question 17

Fetal side of placenta in pigs

Answer 17

Areola

Question 18

Where does blood cross over in horses

Answer 18

Microcoyeldans

Question 19

Where does blood cross over in zonary placenta

Answer 19

The central girdle

Question 20

Which placenta is invasive

Answer 20

Discoid placenta

Question 21

Cotyldons are on the

Answer 21

Fetus side

Question 22

Caruncles are on the

Answer 22

Maternal side

Question 23

Which placenta is noninvasive

Answer 23

Cotyldonary placenta

Question 24

Which placenta is the least efficient

Answer 24

Cotyledonary placenta

Question 25

Which placenta is most efficient

Answer 25

Discoid placenta

Question 26

How to determine fetal age

Answer 26

Rectal palpation, ultrasound, crown-rump length

Question 27

How often are cows milked

Answer 27

2-3x/day

Question 28

Why are cows milked frequently

Answer 28

It can increase milk yield

Question 29

Where is milk produced and stored in mammary gland

Answer 29

Produced in alveoli, stored in gland cistern

Question 30

What ligament forms a sling around the udder

Answer 30

Lateral suspensory ligament

Question 31

What hormone inhibits milk letdown

Answer 31

Catecholamines

Question 32

Piglets death after 100 days are

Answer 32

Stillborns

Question 33

Pigs that die in utero between 50-100 days are

Answer 33

Mummies

Question 34

Signs of impending parturition

Answer 34

Restlessness, milk present, mucus from vulva, laying on side

Question 35

How long are sows in the farrowing barn

Answer 35

1 month

Question 36

BCS scale

Answer 36

1-9

Question 37

What temperature are sperm stored

Answer 37

-320 F

Question 38

Critical danger zone of liquid nitrogen?

Answer 38

The neck

Question 39

What temperature do we thaw semen

Answer 39

95F for 30-45 seconds

Question 40

Locations to observe BCS

Answer 40

Tail head, back, ribs

Question 41

First thing you feel for during rectal palpation

Answer 41

Pelvic ridge

Question 42

Blood pregnancy test looks for

Answer 42

PSPB