TOPIC 1:PUBERTY

Question 1

Among females of the domestic species, puberty precedes the development of physical maturity

Answer 1

true

Question 2

as puberty starts, their efficiency, particularly with respect to their fecundity (number of offspring), has not reached its maximum.

Answer 2

true

Question 3

Primordial follicles (each contain__ w/ single layer of____

Answer 3

oocyte
granulosa cells

Question 4

age of puberty of mare

Answer 4

1-2 yrs

Question 5

age of puberty of cows

Answer 5

7-18 mos

Question 6

puberty age of doe or nanny goat

Answer 6

4-8 mos

Question 7

puberty age of ewe

Answer 7

6-15

Question 8

puberty age of bitch

Answer 8

6-20mos

Question 9

puberty age of queen cat

Answer 9

7-12 mos

Question 10

pgymy goats reach puberty at

Answer 10

3mos

Question 11

Initiation of puberty is a function of

Answer 11

age, maturity

Question 12

Signalled by 1st estrous or 1st ovulation

Answer 12

onset of puberty

Question 13

Cows ovulate during what stage of estrous

Answer 13

metestrus

Question 14

chickens mature at 1__wks

Answer 14

18

Question 15

animals that are seasonally polycyclic

Answer 15

mare, ewe, doe/nanny ,cat

Question 16

seasonally monocylic animals

Answer 16

bitch

Question 17

what causes the changes during puberty

Answer 17

pdtn of female gametes
synthesis of hormones

Question 18

cockerels mature at ___ mos

Answer 18

4-5 mos

Question 19

Hormone primarily associated with onset of ovarian cylicity, hence puberty is

Answer 19

LH

Question 20

LH is secreted by

Answer 20

pituitary gland

Question 21

The endocrine trigger for puberty is based on sex steroid feedback regulatory mechanisms, which operate at the level of the tonic or surge centres of the hypothalamus

Answer 21

true

Question 22

Puberty onset relies on the secretion of ovarian ___ so that the circulating concentration is sufficient to stimulate a preovulatory ____ and ___

Answer 22

oestradiol
gonadotrophin-releasing hormone (GnRH) and LH surge.

Question 23

pulsatile LH leads to peak production T/F

Answer 23

false only flashing

Question 24

there is LH surge in prepuberty T/F

Answer 24

false

Question 25

during/or after puberty, this is highly produces that stimulates estradiol pdtn

Answer 25

LH

Question 26

what hormones are high during puberty

Answer 26

LH,FSH, E2

Question 27

what secretes estrogen

Answer 27

granulosa cells

Question 28

theca cells produces what hormone

Answer 28

progesterone

Question 29

what produces LH

Answer 29

PG

Question 30

signs og puberty in males

Answer 30

behavior age of 1st ejaculation quality of ejaculate

Question 31

Puberty in male occurs as a result of a decrease in hypothalamic sensitivity to ___ and ___

Answer 31

E2 and testosterone

Question 32

non seasonal polycyclic animals

Answer 32

cow, sow

Question 33

Seasonal but can be “switched on” when there is increasing day length

Answer 33

mare

Question 34

short day breeders

Answer 34

ewe

Question 35

Movement allows pheromones to be concentrated on the vomeronasal organ

Answer 35

flehmen

Question 36

what causes the changes during puberty in females

Answer 36

pdtn of female gamtes snthesis of hormones

Question 37

High____ production stimulates estradiol production

Answer 37

LH

Question 38

hormones produced during puberty

Answer 38

LH,FSH,E2

Question 39

In the male the rise in LH begins earlier than in the females

Answer 39

true

Question 40

in males, low concentration of ___ crosses the BBB and is converted to ___ by ____

Answer 40

testosterone estradiol aromatase

Question 41

both estradiol and testoterone has a ____ feedback effect on hypothalamic GnRH

Answer 41

negative

Question 42

as tramsition to puberty begins, the sensitivity of the hypothalamic neurons to estradiol increases

Answer 42

false. reduced ung dulo

Question 43

influences the release of LH, FSH and prolactin

Answer 43

melatonin

Question 44

source of melatonin

Answer 44

pineal gland

Question 45

kisspeptin influences the release of ___

Answer 45

GnRH

Question 46

leptin is secreted by

Answer 46

fat cells

Question 47

Animals with good growth rate attain puberty before those with slow growth rate

Answer 47

true

Question 48

Giving high amounts of Carbohydrates (feed) to sows to induce hyperovulation

Answer 48

flushing

Question 49

pedigree cats are more sensitive to seasons

Answer 49

true

Question 50

puberty age of small breed dogs

Answer 50

5-6mos

Question 51

puberty age of large breed dogs

Answer 51

18mos

Question 52

dog breeds affected by season

Answer 52

basenji, tibettan

Question 53

puberty age of cats

Answer 53

by wt. females : 2.3-2.5 males: 3.5 kg

Question 54

Isolation triggers estrus in goats and does

Answer 54

true

Question 55

puberty age of pigs

Answer 55

7mos

Question 56

all pigs are affected by seasonality

Answer 56

only wild

Question 57

gilts/pigs must delay until 2nd heating to increase ovulation T/F

Answer 57

false. 3rd estrus

Question 58

target wt of cows to be ready for breeding

Answer 58

65-67% of mature weight

Question 59

one example of Determinant of seminal quality and quantity

Answer 59

scrotal circumference

Question 60

is a cursor for measurement of scrotal circumference

Answer 60

central bar

Question 61

buffaloes have wider scrotal circumference that bulls

Answer 61

bulls>buffaloes

Question 62

puberty age of stallions

Answer 62

12-15mos

Question 63

animals where 1st ovulation is not preceded by behavioral oestrus

Answer 63

ewe,lamb

Question 64

ewes can be bred in PH all year round

Answer 64

true

Question 65

Other external factors influencing puberty

Answer 65

nutrition, climate, proximity to male, dz

Question 66

flushing in pigs is giving feed with high ___ content to trigger hyperovulation

Answer 66

carbs

Question 67

melatonin influences the release of what hormones

Answer 67

lh, fsh, prolactin

Question 68

absence of male triggers the estrus in ram/buck effect

Answer 68

true

Question 69

Common phenomena in cattle:

Answer 69

Subestrus or silent heat