Reproductive Endocrinology Flashcards
Where does Oxytocin come from?
Posterior pituitary
What is the biochemical classifications of FSH, LH, Inhibin?
Glycoproteins
What is the biochemical classification of Progesterone, Testosterone, & Estradiol?
Steroid
What is the biochemical classification of GnRH?
Peptide
What kind of receptors do Protein hormones(FSH, LH, Inhibin) bind to?
Plasma membrane bound receptors
What kind of hormones travel freely through plasma membrane into cytoplasm and binds directly to specific nuclear receptors?
Steroid horomones
Which species’s onset of puberty is influenced by pheromones?
Small ruminants & pigs
Period of sexual receptivity. Heat.
Estrus
What is the length of the bovine estrous cycle?
21 days
What species’s are polyestrus?
Cows
Swine
Rodents
What species’s are seasonally polyestrus and are short-day/fall breeders?
Sheep & goats
What species’s are seasonally polyestrus and are long-day/spring breeders?
Mares
What is the classification of a dogs estrous cycle?
Monestrus
What is the dominant hormone during the follicular phase?
Estrogen
What is the dominant ovarian structure during the follicular phase?
Follicles
What is the dominant ovarian structure during the luteal phase of the estrous cycle?
Corpus luteum
What is the dominant hormone during the luteal phase of the estrous cycle?
Progesterone
When does the follicular phase of the estrous cycle end?
Ovulation
What 2 stages of the estrous cycle take place during the follicular phase?
Proestrus
Estrus
What 2 stages of the estrous cycle take place during the luteal phase?
Metestrus
Diestrus
Which of the 4 phases of estrous has the peak estrogen secretion? What species are the exception?
Estrus
Dog-happens during proestrus
What signals the end of diestrus?
Luteolysis
Which of the 4 phase of estrous has the peak progesterone level?
Diestrus
Which hormone do we monitor to detect receptivity in the dog?
Progesterone
How long does diestrus last in dogs?
2 months
Which two species are induced ovulators?
Cat
Llama
