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ANS 221 > Lab Practical 2 > Flashcards

Lab Practical 2 Flashcards

1
Q

The trophectoderm becomes the

A

Placenta

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2
Q

The inner cell mass becomes the

A

Fetus

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3
Q

Function of placenta

A

Protection, nutrition, respiration, hormone production

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4
Q

4 types of placentas

A

Diffuse, zonary, cotyledonary, discoid

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5
Q

Which species has the zonary placenta

A

Cat and dogs

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6
Q

How many layers of tissue does the zonary placenta have

A

5

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7
Q

How many layers does the cotyledonary placenta have

A

6

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8
Q

Which species has the cotyledonary placenta

A

Cows, sheep

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9
Q

Which species have the diffuse placenta

A

Pigs, horses

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10
Q

How many layers does the diffuse placenta have

A

6

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11
Q

How many layers does the discoid placenta have

A

3

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12
Q

Which species has the discoid placenta

A

Humans and rodents

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13
Q

Embryogenesis

A

Process of embryo forming and developing

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14
Q

Which stage does the morula form

A

16 cell stage

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15
Q

Where does blood cross over in diffuse placenta

A

Chorionic villi

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16
Q

Maternal side of placenta in pigs

A

Rugae

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17
Q

Fetal side of placenta in pigs

A

Areola

18
Q

Where does blood cross over in horses

A

Microcoyeldans

19
Q

Where does blood cross over in zonary placenta

A

The central girdle

20
Q

Which placenta is invasive

A

Discoid placenta

21
Q

Cotyldons are on the

A

Fetus side

22
Q

Caruncles are on the

A

Maternal side

23
Q

Which placenta is noninvasive

A

Cotyldonary placenta

24
Q

Which placenta is the least efficient

A

Cotyledonary placenta

25
Q

Which placenta is most efficient

A

Discoid placenta

26
Q

How to determine fetal age

A

Rectal palpation, ultrasound, crown-rump length

27
Q

How often are cows milked

A

2-3x/day

28
Q

Why are cows milked frequently

A

It can increase milk yield

29
Q

Where is milk produced and stored in mammary gland

A

Produced in alveoli, stored in gland cistern

30
Q

What ligament forms a sling around the udder

A

Lateral suspensory ligament

31
Q

What hormone inhibits milk letdown

A

Catecholamines

32
Q

Piglets death after 100 days are

A

Stillborns

33
Q

Pigs that die in utero between 50-100 days are

A

Mummies

34
Q

Signs of impending parturition

A

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

35
Q

How long are sows in the farrowing barn

A

1 month

36
Q

BCS scale

A

1-9

37
Q

What temperature are sperm stored

A

-320 F

38
Q

Critical danger zone of liquid nitrogen?

A

The neck

39
Q

What temperature do we thaw semen

A

95F for 30-45 seconds

40
Q

Locations to observe BCS

A

Tail head, back, ribs

41
Q

First thing you feel for during rectal palpation

A

Pelvic ridge

42
Q

Blood pregnancy test looks for

A

PSPB

ANS 221 (3 decks)

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