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Animal Science I Key Terms & 2nd half questions > (2nd term) Unit 7 > Flashcards

(2nd term) Unit 7 Flashcards

1
Q

Female gametes or ovum are usually fertile for about ______ hours

25

15

20

30

A

25

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2
Q

Gametes containing one half of the genetic material found in normal body cells are called ____________.

diploid

fulloid

haploid

A

haploid

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3
Q

True or False?
If an animal becomes frightened or upset, a hormone called epinephrine (adrenaline) is released that inhibits milk letdown.

A

True

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4
Q

Ewes are _____ breeders.

Spring and Summer

Fall and Winter

seasonal

A

seasonal

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5
Q

Once a cell begins spermatogenesis it takes approximately ____ days to turn into a mature sperm cell ready to fertilize an egg.

30

90

60

120

A

60

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6
Q

Three functions of the placenta include: providing nutrients and oxygen to the developing embryo/fetus, removing waste products and producing ______________.

membranes

parturition

hormones

organs

A

hormones

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7
Q

True or False?
The male’s role is to produce large numbers of viable male sex calls called epididymis.

A

False

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8
Q

The _____ or fallopian tubes are found at the anterior end of each uterine horn.

testicles

oviducts

ovaries

follicles

A

oviducts

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9
Q

_____ occurs between metestrus and proestrus and is the longest period of the cycle.

Estrus

Puberty

Diestrus

Parturition

A

Diestrus

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10
Q

Fertilization consists essentially of the fusion of two cells, the male and female gametes, to form one single cell, the_________.

zygote

centromere

ovaries

cytoplasm

A

zygote

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11
Q

Mastitis is a factor which causes a(n) _______ in milk production.

no change

slight change

increase

decrease

A

decrease

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12
Q

The _______ functions as a heat regulating mechanism.

urethra

lobules

scrotum

testicles

A

scrotum

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13
Q

Gestation for a cow is _______ days.

150

330

114

285

A

285

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14
Q

Colostrum, the first milk, provides the young animal with ___________.

antibodies

diseases

hormones

antibiotics

A

antibodies

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15
Q

Fertilization occurs in the _________.

udder

gamete

colostrum

oviduct

A

oviduct

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16
Q

True or False?
During the birthing process, piglets do not orient themselves in any one direction, head or tail first.

A

True

17
Q

True or False?
Parturition is the act or process of giving birth.

A

True

18
Q

True or False?

The lactation curve is the period during which the mammary glands will not secrete milk.

A

False

19
Q

A distended _________ and swollen vulva are signs of impending parturition.

udder

uterus

fetus

placenta

A

udder

20
Q

Explain, in a few sentences, why synchronizing estrus can be better for the farmer:

A

Synchronizing estrus can be better for farmers for multiple reasons. It can make record keeping easier, and increase pregnancy rates. In a group of cows that are in estrus, they will encourage each other to stand multiple times verses being in estrus at different times. They can better control when they are calving as well.

21
Q

What happens to levels of estrogen during the middle 10-15 days of a cow’s estrus cycle?

Estrogen matches progesterone levels

Estrogen lowers drastically

Estrogen remains the same

Estrogen inceases

A

Estrogen lowers drastically

22
Q

Looking at the reproductive tract of the cow, what produces the progesterone?

Corpus luteum

Follicle

Ovary

Oviduct

A

Corpus Luteum

23
Q

When is the correct timing of AI?

Same time as standing heat begins

34 hours after standing estrus

12 hours after standing estrus begins

48 hours after standing estrus begins

A

12 hours after standing estrus begins

24
Q

Why don’t producers use AI? Check all that apply.

Cost

Too complicated

Time & labor

Facilities

All of the above

A

All of the above

25
Q

What does a heat detection aid do?

Determines progesterone levels.

Tells when a cow is starting standing heat

Alerts the owner when a cow is mounted

Determines estrogen levels

A

Alerts the owner when a cow is mounted

26
Q

About how many hours after a cow is in standing estrus, does ovulation happen?

50

40

30

20

A

30

27
Q

What are the “Big 3” in controlling estrus cycles?

GnRH, PG, Progestin

GnRH, FSH, LH

GnRH, PG, Estrogen

GnRH, Estrogen, Progesterone

A

GnRH, PG, Progestin

28
Q

Which hormone can initiate cyclicity in anestrous cows?

PG

GnRH

Estrogen

Progestin

A

Progestin

29
Q

What breed of dairy cattle do the Luchsinger Family raise?

Jersey

Red Polled

Holstein

A

Jersey

30
Q

In what year was the farm started?

1914

1970

1928

1924

A

1914

31
Q

What were the calves being fed out of the pails?

Water

Grain

Feed

Milk

A

Milk

32
Q

Approximately how many cows are on the farm?

109

200

300

400

A

109

Animal Science I Key Terms & 2nd half questions (11 decks)

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