TPS 4 and 5 Quiz 2 Flashcards
What prevents E2 from entering the fetal brain?
Alpha-fetoprotein
Which is NOT a definition of puberty in the female?
a. age at first ovulation
b. age at which female can support pregnancy without deleterious effects
c. age at which she reaches a threshold of fatness
d. age at first estrus/menses
c. age at which she reaches a threshold of fatness
What hormone is responsible for inhibiting kisspeptin before the onset of puberty?
Estrogen
What is the correct order of the stages of the estrous cycle?
Estrus, metestrus, diestrus, proestrus
T or F. In humans the follicular phase represents 20% of the menstrual cycle and the luteal phase represents 80% of the menstrual cycle.
False (50/50)
The most important factor preventing the LH surge is:
a. FSH and LH are too low to stimulate follicles
b. estrogen too low to stimulate the surge center
c. all of these
d. follicules are not stimulated to secrete estrogen
c. all of these
The two hormones that are responsible for threshold estrogen secretion are?
FSH and LH
Alpha-fetoprotein is biochemically classified as a ____ and is synthesized by the fetal ____
glycoprotein, liver
How does the surge center develop full neural activity for puberty in the female?
a. loss of negative feedback sensitivity of GnRH neurons to E2
b. none of these
c. loss of positive feedback sensitivity of kisspeptin neurons to E2
d. increase of positive feedback sensitivity of GnRH neurons to T4
b. none of these
T or F. Horses are induced ovulators
False, spontaneous
T or F. the dog is a seasonal polyestrus species
False
Which is typically the shortest stage of estrous?
estrus
Which best describes metestrus?
formation of a CL from the ovulatory follicle
Women have a _____ phase and ____ phase during a mentrual cycle
a. none of these
b. proliferative, secretory
c. follicular, luteal
d. all of theses
d. all of these
The unique phase of estrous in a non-mated queen is?
postestrus
T or F. Lactational anestrus is caused alone by the suckling stimulation of a calf.
False, multiple factors (sight, smell, touch, or calf, etc.)
T or F. Gestation is 2 months in the queen
True
Which species exhibits lactational anestrus?
Queen???
What is the role of melatonin in short day breeders?
Shorter days results in high melatonin release that is less stimulatory to RFRP neurons, decreasing RFRP-3, removing inhibition of kisspeptin neurons, stimulating GnRH release to induce cyclicity
Match the terms: Theca interna cells have
LH receptors
Match the terms: granulosa cells have
FSH receptors
Match the terms: FSH receptors causes
aromatase activation to convert T4 to E2
Match the terms: inhibin causes
inhibition of FSH
Match the stages, hormones, and roles in the estrous cycle below: dictates gonadotropins
FSH and LH
