(2nd term) Unit 7 Flashcards
Female gametes or ovum are usually fertile for about ______ hours
25
15
20
30
25
Gametes containing one half of the genetic material found in normal body cells are called ____________.
diploid
fulloid
haploid
haploid
True or False?
If an animal becomes frightened or upset, a hormone called epinephrine (adrenaline) is released that inhibits milk letdown.
True
Ewes are _____ breeders.
Spring and Summer
Fall and Winter
seasonal
seasonal
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
60
Three functions of the placenta include: providing nutrients and oxygen to the developing embryo/fetus, removing waste products and producing ______________.
membranes
parturition
hormones
organs
hormones
True or False?
The male’s role is to produce large numbers of viable male sex calls called epididymis.
False
The _____ or fallopian tubes are found at the anterior end of each uterine horn.
testicles
oviducts
ovaries
follicles
oviducts
_____ occurs between metestrus and proestrus and is the longest period of the cycle.
Estrus
Puberty
Diestrus
Parturition
Diestrus
Fertilization consists essentially of the fusion of two cells, the male and female gametes, to form one single cell, the_________.
zygote
centromere
ovaries
cytoplasm
zygote
Mastitis is a factor which causes a(n) _______ in milk production.
no change
slight change
increase
decrease
decrease
The _______ functions as a heat regulating mechanism.
urethra
lobules
scrotum
testicles
scrotum
Gestation for a cow is _______ days.
150
330
114
285
285
Colostrum, the first milk, provides the young animal with ___________.
antibodies
diseases
hormones
antibiotics
antibodies
Fertilization occurs in the _________.
udder
gamete
colostrum
oviduct
oviduct
True or False?
During the birthing process, piglets do not orient themselves in any one direction, head or tail first.
True
True or False?
Parturition is the act or process of giving birth.
True
True or False?
The lactation curve is the period during which the mammary glands will not secrete milk.
False
A distended _________ and swollen vulva are signs of impending parturition.
udder
uterus
fetus
placenta
udder
Explain, in a few sentences, why synchronizing estrus can be better for the farmer:
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.
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
Estrogen lowers drastically
Looking at the reproductive tract of the cow, what produces the progesterone?
Corpus luteum
Follicle
Ovary
Oviduct
Corpus Luteum
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
12 hours after standing estrus begins
Why don’t producers use AI? Check all that apply.
Cost
Too complicated
Time & labor
Facilities
All of the above
All of the above
