Lab 1 - Ovarian Cycle Flashcards
the hypothalamus releases what (1)
gonadotropin releasing hormone
what does the pituitary gland release (3)
FSH
LH
gonadotropin
what releases estrogen? (3)
growing follicle
mature follicle
corpus luteum
what releases progesterone? (1)
CL
the release of FSH and LH from the pituitary gland does what ? explain the process to ovulation
FSH- causes follicular growth from primordial follicles to mature (Graafian follicle)
LH- follicular growth from secondary follicle to Graafian follicle.
The mature Graafian follicle secretes estrogen. Estrogen causes levels of LH to peak. Spike causes ovulation
what cells produce estrogen?
the granulosa cells
Parts of the dominant follicle expelled at ovulation (3)
zona pellucida
coronal radiate
oocyte
what is the corpus luteum? what does it produce?
It is the non-fertilized dominant follicle that degenerates unless pregnancy has begun
Primarily produces progesterone and a lesser degree estrogen
oocyte
immature female gamete
Ovum
Mature germ cell ready to bind with male germ cell
what happens to the CL if not fertilized?
transforms into a more solid fatty structure called corpus albicans. progesterone secretion diminishes and its supporting effect on the endometrium is reduced - leading to menstruation
in the menstrual cycle, the hormone involved in the growth of the endometrium are
estrogen and progesterone
estrogen comes from where
the dominant follicle
after ovulation the dominant hormone is
progesterone
menses initiated by
a drop in progesterone
