Reproductive Flashcards
process that allows for the exchange of genetic information at the onset of meiosis?
crossing over
If mitosis is for somatic cells, ___ is for gametes
meiosis
products after second meiosis
4 daughter cells containing 23 chromosomes
produces about 60% of the semen
seminal vesicle
site of final maturation of sperm
epididymis
saclike structure that contains the testes
scrotum
what muscle contracts when cold and contraction results in the scrotum being firm and wrinkled, reducing the overall size of the scrotum?
dartos muscle
What is the layer of smooth muscle under the superficial fascia of the scrotum called?
dartos muscle
effect of the contraction of dartos & cremaster muscles?
testes closer to the body = warmer & firm, wrinkled scrotum = smaller in size
site of sperm production in the testes
seminiferous tubules
why is it important that the testes are located outside the body cavity?
sperm must develop at temperatures less than normal body temp
where do human gonads initially develop?
in the abdominopelvic cavity (near the kidneys)
they move from that cavity through the inguinal canal
____ is the process of sperm production
spermatogenesis
what do interstitial cells produce
testosterone
precursor cells of sperm cells are called
spermatogonia or germ cell (spermatogonium for singular)
a mature sperm cell is also known as?
spermatozoon
part of the sperm that contains enzymes needed to penetrate the egg is called
acromosome
The ductules that carry sperm from the testis and empty into the epididymis are the?
efferent ductules
the final changes that occur in sperm after ejaculation is termed as?
capacitation
after sperm production in the testes, where does sperm travel to reach the epididymis?
rete testis first then efferent ductules
the duct that carries sperm from epididymis to ejaculatory duct is called?
vas/ductus deferens
arrange the structures in order
sperm travel
- seminiferous tubules
- epididymis
- vas deferens
- urethra
- ejaculatory duct
- rete testis
- efferent ductules
- seminiferous tubules
- rete testis
- efferent ductules
- epididymis
- vas deferens
- ejaculatory duct
- urethra
a wider area of the vas deferens close to the prostate
ampulla
tube that transports sperm from the ductus deferens through the prostate gland and into the urethra is the?
ejaculatory duct
arrange
sperm travel structures
- ampulla
- vas deferens
- ejaculatory duct
- membranous urethra
- spongy urethra
- prostatic urethra
- vas deferens
- ampulla
- ejaculatory duct
- prostatic urethra
- membranous urethra
- spongy urethra
are seminal vesicles located anterior or posterior to the urinary bladder?
posterior to the urinary bladder
what forms when the seminal vesicles and the vas deferens converge?
ejaculatory duct
What is the erectile column of the penis that passes along the ventral side and encloses the penile urethra?
corpus spongiosum
what are the 3 columns of erectile tissue in the penis?
2 corpora cavernosa - dorsal side
1 corpus spongiosum - ventral side
loose fold of skin that covers the glans penis
prepuce
opening of the penis
external urethral orifice
bulbourethral secretion
mucous for:
- urethra & intercourse lubricant
- neut of vagina & urethra (sperm mvmnt)
Seminal Vesicle secretion
4F (Fluid, Fructose, Fibrinogen, Flavin, Prostaglandin)
Prostate gland secretion
alkaline solution, proteolytic enzymes
thin, milky
A component of the semen that is a thick, nourishing fluid and stimulates smooth muscle contractions is produced by the
seminal vesicles
The gonadotropin that stimulates spermatogenesis is
FSH
In males, FSH targets the ___ and LH targets the ____ of the testes.
sustentacular cells (sertoli cells); interstitial cell
movement of sperm and fluids through the male repro system to the urethra is termed as
emission
forceful expulsion of semen from the urethra is called?
ejaculation