I Follicular phase Hypothalamus Pituitary hormone Il Ovulation Hypothalamus effect: LH and FSH stimulate several follicles to grow Pituitary hormone effect: LH and FSH stimulate maturation of one of the growing follicles. GnRH GNRH Anterior pituitary Anterior pituitary Estrogen Ovarian hormone effects: Follicles produce low levels of estrogen that • Inhibk GARH secretion by the hypothalamus, keeping LH and FSH levels low. Esrogen • Cause endometrial arteries to constrict due to low levels, resuling in menstruation. Ovarian hormone effects: Dominant follicle produces high levels of estrogen, which: • Sumulate GnRH secretion by the hypothalamus. LH and FSH FSH FSH LH LH Ovaries Estrogen Ovaries Follicles Folides Estrogen levels rise, resulting in avulation about a day later. • Cause the endometrium to thicken. Uterus Uterus Endometrium Endometrium III Luteal phase Hypothalamus Pituitary hormone effect: LH stimulates formation of a corpus luteum from follicular tissue let behind after Dvulation. GNRH Anterior pituitary Ovarian hormone effects: FSH Estrogen The corpus luteum secretes estrogen and progesterone that • Block GnRH production by the hypothalamus and LH and FSH production by the ptuitary. • Cause the LH Ovaries Progesterone Corpus luteum Estrogen Uterus Progesterane Endometrium endametrium to further develop. Figure 18.17 The ovarian and menstrual cycles of female reproduction are regulated by hormones produced by the hypothalamus, pituitary, and ovaries. Which of the following statements about hormone regulation of the female reproductive cycle is false? a. LH and FSH are produced in the pituitary, and estrogen and progesterone are produced in the ovaries. b. Estradiol and progesterone secreted from the corpus luteum cause the endometrium to thicken. c. Both progesterone and estrogen are produced by the follicles. d. Secretion of GNRH by the hypothalamus is inhibited by low levels of estrogen but stimulated by high levels of estrogen.
I Follicular phase Hypothalamus Pituitary hormone Il Ovulation Hypothalamus effect: LH and FSH stimulate several follicles to grow Pituitary hormone effect: LH and FSH stimulate maturation of one of the growing follicles. GnRH GNRH Anterior pituitary Anterior pituitary Estrogen Ovarian hormone effects: Follicles produce low levels of estrogen that • Inhibk GARH secretion by the hypothalamus, keeping LH and FSH levels low. Esrogen • Cause endometrial arteries to constrict due to low levels, resuling in menstruation. Ovarian hormone effects: Dominant follicle produces high levels of estrogen, which: • Sumulate GnRH secretion by the hypothalamus. LH and FSH FSH FSH LH LH Ovaries Estrogen Ovaries Follicles Folides Estrogen levels rise, resulting in avulation about a day later. • Cause the endometrium to thicken. Uterus Uterus Endometrium Endometrium III Luteal phase Hypothalamus Pituitary hormone effect: LH stimulates formation of a corpus luteum from follicular tissue let behind after Dvulation. GNRH Anterior pituitary Ovarian hormone effects: FSH Estrogen The corpus luteum secretes estrogen and progesterone that • Block GnRH production by the hypothalamus and LH and FSH production by the ptuitary. • Cause the LH Ovaries Progesterone Corpus luteum Estrogen Uterus Progesterane Endometrium endametrium to further develop. Figure 18.17 The ovarian and menstrual cycles of female reproduction are regulated by hormones produced by the hypothalamus, pituitary, and ovaries. Which of the following statements about hormone regulation of the female reproductive cycle is false? a. LH and FSH are produced in the pituitary, and estrogen and progesterone are produced in the ovaries. b. Estradiol and progesterone secreted from the corpus luteum cause the endometrium to thicken. c. Both progesterone and estrogen are produced by the follicles. d. Secretion of GNRH by the hypothalamus is inhibited by low levels of estrogen but stimulated by high levels of estrogen.
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Figure 18.17 Which of the following statements about hormone regulation of the female reproductive cycle is false?
a. LH and FSH are produced in the pituitary, and estrogen and progesterone are produced in the ovaries.
b. Estradiol and progesterone secreted from the corpus luteum cause the endometrium to thicken.
c. Both progesterone and estrogen are produced by the follicles.
d. Secretion of GnRH by the hypothalamus is inhibited by low levels of estrogen but stimulated by high levels of estrogen.
Transcribed Image Text:I Follicular phase Hypothalamus
Pituitary hormone
Il Ovulation
Hypothalamus
effect: LH and FSH
stimulate several
follicles to grow
Pituitary hormone
effect: LH and FSH
stimulate maturation
of one of the
growing follicles.
GnRH
GNRH
Anterior
pituitary
Anterior
pituitary
Estrogen
Ovarian
hormone
effects:
Follicles produce
low levels of
estrogen that
• Inhibk GARH
secretion by
the hypothalamus,
keeping LH and
FSH levels low.
Esrogen • Cause endometrial
arteries to constrict
due to low levels,
resuling in
menstruation.
Ovarian
hormone
effects:
Dominant follicle
produces high
levels of estrogen,
which:
• Sumulate GnRH
secretion by the
hypothalamus.
LH and FSH
FSH
FSH
LH
LH
Ovaries
Estrogen
Ovaries
Follicles
Folides
Estrogen
levels rise,
resulting in
avulation about
a day later.
• Cause the
endometrium
to thicken.
Uterus
Uterus
Endometrium
Endometrium
III Luteal phase
Hypothalamus
Pituitary hormone
effect: LH stimulates
formation of a corpus
luteum from follicular
tissue let behind after
Dvulation.
GNRH
Anterior
pituitary
Ovarian
hormone
effects:
FSH
Estrogen
The corpus
luteum secretes
estrogen and
progesterone that
• Block GnRH
production by the
hypothalamus
and LH and
FSH production
by the ptuitary.
• Cause the
LH
Ovaries
Progesterone
Corpus luteum
Estrogen
Uterus
Progesterane
Endometrium
endametrium to
further develop.
Figure 18.17 The ovarian and menstrual cycles of female reproduction are regulated by hormones produced by
the hypothalamus, pituitary, and ovaries.
Which of the following statements about hormone regulation of the female reproductive cycle is false?
a. LH and FSH are produced in the pituitary, and estrogen and progesterone are produced in the ovaries.
b. Estradiol and progesterone secreted from the corpus luteum cause the endometrium to thicken.
c. Both progesterone and estrogen are produced by the follicles.
d. Secretion of GNRH by the hypothalamus is inhibited by low levels of estrogen but stimulated by high
levels of estrogen.
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