ANSC 333 Exam 3
Where is GnRH produced - ANS-tonic center
GnRH in males - ANS-pulse every 4-6 hours, no surges
what doe GnRH do - ANS-stimulate FSH and LH from anterior pituitary
which has a lower peak: GnRH or LH - ANS-GnRH
where is testosterone produced - ANS-leydig cells in testicles
what happens to testosterone after vasectomy - ANS-not enough is produced
what does LH act on in males - ANS-leydig cells
what does FSH act on in males - ANS-sertoli cells
primary male hormone - ANS-testosterone
do males need the 2 cell, 2 gonadatropin cell theory? - ANS-NO
leydig cells make large amounts of _______ and small amounts of ____ so the cells
make small quantities of ______.
testosterone can be trafficked into the sterolli cell to be converted to either ____ and
____ - ANS-testosterone,
aromatase,
estradiol,
estradioil or dihydrotestosterone
where is estradiol made in males - ANS-small quantities in leydig cell for sertoli cell, or
sertoli cell
what does sertoli cells convert testosterone into - ANS-dihydrotestosterone
secondary hormone products in males - ANS-estradiol and dihydrotestosterone
in responce to FSH acting on steroli cells, they make inhibin - ANS-negative feedback
on ant. pit. to inhibits secretion of FSH
, what would happen if inhibin were to completely stop production of FSH -
ANS-spermatogenesis would fail
gamete production in males - ANS-mature sperm are produced continuously and in
massive numbers
When testosterone, dihydrotestosterone and estradiol are released form the testes... -
ANS-they will have negative feedback and suppress GnRH, but just enough to keep the
system going
GnRH suppression depends on - ANS-1. individualism
2. how much testosterone is made
3. how fast the animal metabolizes
in pulses testosterone is decreasing because - ANS-its metabolized
when there is lower levels, GnRH is no longer blocked and get another pulse
hormones during spermatogenesis - ANS-1. testosterone
2. GnRH
3. LH
4. FSH
5. inhibin
6. estradiol
7. dihydrotestosterone
where are gametes produced - ANS-seminiferous tubules
spermatogenesis stages - ANS-1. proliferation
2. meiosis
3. differentiation
proliferation stage - ANS-- cell replication (mitotic divison) *
diff than females b/c oocytes dont divided
- the ability to have 32 spermatogonia at the end
- 2nd to occur in phase: stem cell renewal: undifferentiated cell some of the calls revert
back to becomes A1 spermatogonia cell again
Where is GnRH produced - ANS-tonic center
GnRH in males - ANS-pulse every 4-6 hours, no surges
what doe GnRH do - ANS-stimulate FSH and LH from anterior pituitary
which has a lower peak: GnRH or LH - ANS-GnRH
where is testosterone produced - ANS-leydig cells in testicles
what happens to testosterone after vasectomy - ANS-not enough is produced
what does LH act on in males - ANS-leydig cells
what does FSH act on in males - ANS-sertoli cells
primary male hormone - ANS-testosterone
do males need the 2 cell, 2 gonadatropin cell theory? - ANS-NO
leydig cells make large amounts of _______ and small amounts of ____ so the cells
make small quantities of ______.
testosterone can be trafficked into the sterolli cell to be converted to either ____ and
____ - ANS-testosterone,
aromatase,
estradiol,
estradioil or dihydrotestosterone
where is estradiol made in males - ANS-small quantities in leydig cell for sertoli cell, or
sertoli cell
what does sertoli cells convert testosterone into - ANS-dihydrotestosterone
secondary hormone products in males - ANS-estradiol and dihydrotestosterone
in responce to FSH acting on steroli cells, they make inhibin - ANS-negative feedback
on ant. pit. to inhibits secretion of FSH
, what would happen if inhibin were to completely stop production of FSH -
ANS-spermatogenesis would fail
gamete production in males - ANS-mature sperm are produced continuously and in
massive numbers
When testosterone, dihydrotestosterone and estradiol are released form the testes... -
ANS-they will have negative feedback and suppress GnRH, but just enough to keep the
system going
GnRH suppression depends on - ANS-1. individualism
2. how much testosterone is made
3. how fast the animal metabolizes
in pulses testosterone is decreasing because - ANS-its metabolized
when there is lower levels, GnRH is no longer blocked and get another pulse
hormones during spermatogenesis - ANS-1. testosterone
2. GnRH
3. LH
4. FSH
5. inhibin
6. estradiol
7. dihydrotestosterone
where are gametes produced - ANS-seminiferous tubules
spermatogenesis stages - ANS-1. proliferation
2. meiosis
3. differentiation
proliferation stage - ANS-- cell replication (mitotic divison) *
diff than females b/c oocytes dont divided
- the ability to have 32 spermatogonia at the end
- 2nd to occur in phase: stem cell renewal: undifferentiated cell some of the calls revert
back to becomes A1 spermatogonia cell again
