BIOL 3150 CHAPTER 28 EXAM QUESTIONS AND ANSWERS
WITH COMPLETE SOLUTIONS VERIFIED
puberty male vs female
F: 8-13 y/o
M: 9-14 y/o
secondary sex characteristics
changes associated with maturity and puberty due to hormone changes, but are not
involved in reproductive process
Wolffian duct
male accessory organs derive from this duct
aka mesonephric
Mullerian ducts
precursors to female internal structures
SRY gene
region of y chrom that activates at 7-8 weeks
androgens produced support male reproductive system
MIH produced degeneration female reproductive system
MIH
mullerian inhibiting hormone
signal mullerian duct degredation in response to SRY gene
Female embryo development
,if SRY gene is not present (no Y chrom), ovary and female reproductive system develop
degrade Wolffian duct
genital ridge
The precursor to female or male gonads (ovaries or testes). It appears identical in
genetic female and male embryos.
male reproductive function (3)
produce and store mature and functional gametes
provide them nutrients and transport
produce steroids
continuous reproductive system
male: sperm start in one location and travel through the system until they leave- no
break in the pathway
where in body do testes form
inside body cavity, end up outside
gubernaculum
CT bundle that extends from testis to floor of scrotum
gubernaculum length
DOES NOT CHANGE, instead it changes position to bring testes into scrotum
gubernaculum contraction
hormone levels at around 7 month signal contraction of testis into scrotum
tunica vaginalis
outer layer derived from peritoneum and has visceral and serous layers
tunica vaginalis function
, allow testis to move in scrotum w out friction
spermatic cord (4 parts)
ductus deferens, blood vessels, nerves, and lymphatic vessels that go to testis
tunica albuginea of testis
CT capsule deep to tunica vaginalis
becomes the septum which divides testis into seminiferous tubules
sustentacular cells
provide nourishment for development of sperm
cremaster muscle
cause retraction of testis into body to keep them warm
Dartos muscle
SmM that increases or decreases the surface area of the scrotum for temperature
regulation
relaxes/expands to cool, constricts to keep heat
pampiniform plexus
a network of testicular veins that drain the testes and absorb body heat
pampiniform plexus cooling
blood leaving testis is warmed by blood in adjacent artery, blood entering testis cooled
by blood leaving
spermatogenesis occurs at a temp cooler than body temp
blood-testis barrier
tight jxns between sustentacular cells
isolates sperm from immune system
WITH COMPLETE SOLUTIONS VERIFIED
puberty male vs female
F: 8-13 y/o
M: 9-14 y/o
secondary sex characteristics
changes associated with maturity and puberty due to hormone changes, but are not
involved in reproductive process
Wolffian duct
male accessory organs derive from this duct
aka mesonephric
Mullerian ducts
precursors to female internal structures
SRY gene
region of y chrom that activates at 7-8 weeks
androgens produced support male reproductive system
MIH produced degeneration female reproductive system
MIH
mullerian inhibiting hormone
signal mullerian duct degredation in response to SRY gene
Female embryo development
,if SRY gene is not present (no Y chrom), ovary and female reproductive system develop
degrade Wolffian duct
genital ridge
The precursor to female or male gonads (ovaries or testes). It appears identical in
genetic female and male embryos.
male reproductive function (3)
produce and store mature and functional gametes
provide them nutrients and transport
produce steroids
continuous reproductive system
male: sperm start in one location and travel through the system until they leave- no
break in the pathway
where in body do testes form
inside body cavity, end up outside
gubernaculum
CT bundle that extends from testis to floor of scrotum
gubernaculum length
DOES NOT CHANGE, instead it changes position to bring testes into scrotum
gubernaculum contraction
hormone levels at around 7 month signal contraction of testis into scrotum
tunica vaginalis
outer layer derived from peritoneum and has visceral and serous layers
tunica vaginalis function
, allow testis to move in scrotum w out friction
spermatic cord (4 parts)
ductus deferens, blood vessels, nerves, and lymphatic vessels that go to testis
tunica albuginea of testis
CT capsule deep to tunica vaginalis
becomes the septum which divides testis into seminiferous tubules
sustentacular cells
provide nourishment for development of sperm
cremaster muscle
cause retraction of testis into body to keep them warm
Dartos muscle
SmM that increases or decreases the surface area of the scrotum for temperature
regulation
relaxes/expands to cool, constricts to keep heat
pampiniform plexus
a network of testicular veins that drain the testes and absorb body heat
pampiniform plexus cooling
blood leaving testis is warmed by blood in adjacent artery, blood entering testis cooled
by blood leaving
spermatogenesis occurs at a temp cooler than body temp
blood-testis barrier
tight jxns between sustentacular cells
isolates sperm from immune system
