Repro System Physiology 1 Flashcards
What hormone will induce and maintain spermatogenesis?
FSH
What hormone promotes synthesis of testosterone from the leydig cells in testes?
LH
What substance will increase weight of testes?
FSH
What substance will stimulate sertoli cells?
FSH
What substance stimulates final maturation of the follicle?
LSH
What substance stimulates growth and initial maturation of ovarian follicle?
LH
What substance prepares follicle for action of LH?
FSH
What substance released from mature follicles inhibits FSH?
Estrogens. Because of the negative feedback loop.
What substance released after ovulation inhibits FSH?
Progesterone. Because of the negative feedback loop.
What substance stimulates ovulation?
LH
LH is responsible for the formation of what tissue?
The corpus luteum
What 2 hormones is LH responsible for producing via its stimulation of corpus luteum growth?
Estrogen
Progesterone
What is the major androgen?
Testosterone
Where is testosterone produced?
Leydig cells
How does increased levels of testosterone affect spermatogenesis?
It will decrease it due to inhibition of FSH
How is testosterone excreted?
In the bile and urine
What affect does testosterone have on sperm ducts and glands?
It is responsible for their maintenance and development
What hormone controls testosterone?
LH
What affect does testosterone have on libido?
Increases it
What is the composition of semen?
Sperm
Fructose
Prostaglandins
Alkaline fluid
Where is estrogen secreted from in non-pregnant women?
Corpus luteum
Follicle
Where is estrogen secreted from in pregnant women?
Placenta
What is the primary circulating form of estrogen?
Estradiol
How is estrogen excreted?
Excreted in the liver after conjugation in the liver
Proliferation and growth of reproductive tissues and secondary sexual characteristics is the function of what hormone?
Estrogen
What hormone will increase follicle growth?
Estrogen
What hormone will increase ovarian tube motility?
Estrogen
What hormone will inhibit secretory endometrium?
Progesterone
What effect does estrogen have on the endometrium?
Causes it to proliferate
What effect does estrogen have on breast tissue?
Causes development of ducts
What effect does progesterone have on breast tissue?
It causes development of the glands
What hormone peaks before ovulation?
Estrogen
What hormone peaks after ovulation?
Progesterone
The developing follicle secretes what hormone?
Estrogen
The corpus luteum secretes what hormones?
Progesterone and estrogen
What hormone surges during the proliferative phase?
Estrogen
What hormone surges during the secretory phase?
Progesterone
Where does fertilization most often occur?
In the ampulla
What hormone stimulates the corpus luteum to still produce estrogen and progesterone?
Human Chorionic Gonadotropin (HCG)
What hormone causes male fetus to secrete testosterone?
HCG
Why do estrogen and progesterone levels drop in menopause?
No follicles left to stimulate their production
What two hormones are left unopposed in menopause?
FSH and LH
