Puberty w3

Question 1

What is puberty

Answer 1

process of aquiring reproductive potential

Question 2

Female puberty

Answer 2

Age at First oestrus
Age at First ovulation
Age to support pregnancy

Question 3

Male puberty

Answer 3

Age at:
Expresses sexual behaviour
Ejactulation
Spermatozoa are seen
Enough sperm produced for successful fertilisation

Question 4

LH Secretion in Females

Answer 4

Oestradoil and LH surge every 20 days in cattle(E2 just beore LH)

Question 5

Male LH

Answer 5

Pulsatile LH release every 2-6hrs

Testosterone secreted after each LH episode

Question 6

Fundermental requirment for onset of puberty

Answer 6

Sufficient GnRH production by hypothalamic neurons to stimulate FSH and LH release by anteria pituitary

Question 7

Results of sufficient GnRH

Answer 7

Gametogenesis
Steroidogenesis
Development of reproductive tissues

Question 8

Factors affecting puberty in females

Answer 8

Nutrition
Environmental factors (season, photoperiod)
Soical Cues

Question 9

Hypothalamic neurons are sensitive to

Answer 9

GLucose

Question 10

Envirofactors affecting puberty

Answer 10

Season of birth

Photoperiod

Question 11

Lambs Spring born or autumn/fall first to puberty

Answer 11

Spring

Question 12

Heifers - autumn/fall vs spring

Answer 12

Autumn

Question 13

Bos indicus vs Bos taurus

Answer 13

Bos taurus

Question 14

Social cues affecting pubery

Answer 14

Opposite sex -pherimones in urine

Larger groups achieve it first vs smaller groups