repro 7 Flashcards
(40 cards)
Which of the following processes describes the release of enzymes from the sperm which allow the sperm to reach the secondary oocyte membrane?
Cortical reaction
Acrosomal reaction
Capacitation
None of the above
Acrosomal reaction
whats the birthing process called
parturition
what does the placenta secrete (3)
progesterone
estrogen
human placental lactogen
what does progesterone and estrogen secreted by the placenta do
negative feedback to HPG axis preventing follicle development
what does human placental lactogen do
alters mothers metabolism to provide more energy to baby
what is gestational diabetes
too much glucose circulating in mothers body to a diabetic point
when is gestation
from the 1st day of the females last period
what does birth begin with
labor
what is labor
the rhythmic contractions of the uterus
do we know what starts labor forsure?
no
what is the best theory to the start of labor
increased corticotropin releasing hormone in the weeks leading up to birth
what is sometimes used to induce labor
synthetic oxytocin
what happens weeks prior to birth
gap junctions in smooth muscle to make single unit contractions
what happens days prior to onset of labour
the cervix softens and ligaments loosen
what causes the loosening of ligaments holding pelvic bones together (2)
raised estrogen and relaxin
what creates the positive feedback loop in birthing
pressure on the stretching cervix
what does the cervical stretch cause in the posterior pituitary
oxytocin release
what does oxytocin release from the posterior pituitary do
further activate prostaglandins from uterine wall
what are the milk producing cells witin lobules
acini
what stimulates the growth and branching of milk ducts
estrogen
what causes milk duct glans to further develop at pregnancy (3)
estrogen
growth hormone
cortisol
whats the final development of milk ducts (lactation)
progesterone converts epithelium into a secretory structure
what inhibits milk production (2)
estrogen and progesterone
what is initially produced from early mothers for the first 3 days
colostrum
