M1 L1 Flashcards

1
Q

what is biotechnology

A

application of biological knowledge to useful ends

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2
Q

what is animal biotechnology

A

application of biological sciences to livestock agriculture
- development of products/techniques to perturb physiological pathways for improving animal production systems

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3
Q

What does success of animal biotechnology require

A

knowledge of physiological pathways

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4
Q

4 things that biotechnology can impact/improve

A

health, environment, productivity & welfare

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5
Q

differences amongst animals that that can be used for selective breeding purposes

A

genetic polymorphisms

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6
Q

how are high value genetics moved across the world?

A

artificial insemination

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7
Q

what is the oldest biotechnology used?

A

AI

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8
Q

how many mls of boar semen should be collected for AI?

A

250-300ml

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9
Q

what industry most recently adapted AI practices?

A

swine

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10
Q

bull sperm can be used ( ), but boar can only be used ( )

A

frozen, fresh

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11
Q

based on X or Y chromosome

A

sexed sperm

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12
Q

superovulation

A

increase # of embryos produced from 1 female, these can be transferred to recipients

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13
Q

list 4 examples of AI methods

A

ET, IVF, cloning & transgenics

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14
Q

driver of reproductive events in both males & females

A

GnRH

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15
Q

GnRH is released in a ( ) fashion

A

pulsatile

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16
Q

LH & FSH are released in a ( ) fashion

A

pulsatile

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17
Q

T or F: GnRH causes synthesis of FSH but not secretion

A

T

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18
Q

primary regulator of gonads

A

gonadotropins

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19
Q

leydig cells are under ( ) control

A

LH

20
Q

what do leydig cells produce?

A

testosterone

21
Q

what do sertoli cells produce?

A

androgen binding protein

22
Q

androgen binding protein function

A

binds & elevates testosterone levels necessary for spermatogenesis

23
Q

seminiferous tubule

A

allow for sperm flow into epididmyis

24
Q

epididymis

A

where final maturation steps & storage to be ready for mating

25
Q

thecal cells produce ( ) and are regulated by ( )

A

testosterone, are regulated by LH

26
Q

granulosa cells function

A

produce estrogen from testosterone, regulated by FSH

27
Q

corpus lutuem

A

blood clot that is turned into an active gland that secretes a hormone

28
Q

how long does it take for corpus luteum to be active after ovulation

A

3 days

29
Q

what hormone does the corpus luteum secrete

A

progesterone

30
Q

hormone of pregnancy

A

progesterone

31
Q

no LH secretion =

A

progesterone secretion

32
Q

what produces inhibin

A

granulosa cells under FSH control, inhibits FSH secretion

33
Q

what produces activin? How is it stimulated

A

granulosa cells, stimulates FSH secretion by stimulating FSH receptors

34
Q

where do oocytes start maturing

A

primary follicle

35
Q

what hormone causes follicular growth

A

FSH

36
Q

what is ovulation caused by?

A

big spike in LH

37
Q

progesterone has a ( ) feedback on hypothalamus & anterior pituitary

A

negative

38
Q

folliculogenesis

A

primary follicles become dominant follicle

39
Q

T or F: lots enter the growing pool but very few will be ovulated

A

T

40
Q

atresia

A

dying off of follicles

41
Q

graafian follicle

A

follicles ready to ovulate

42
Q

antrum

A

fluid filled space

43
Q

cumulus cell

A

surrounding cells ensure that sperm does contribute to DNA is from a healthy cell to support a pregnancy

44
Q

infundibulum

A

captures follicles in chickens

45
Q

what species uterus is very complex & long

A

swine