Bio 446l Summer Exam 5 Study Questions and Correct Answers
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Course
BIO 446
Institution
BIO 446
Male urethra carries semen and urine; composed of prostatic, membranous, and spongy urethra
Prostatic urethra passes through prostate gland; transitional epithelium
Membranous urethra in UG diaphragm, beyond the sphincter muscle- stratified columnar epithelium
Spongy urethra runs through penis; ...
Bio 446l Summer Exam 5 Study
Questions and Correct Answers
Male urethra ✅carries semen and urine; composed of prostatic, membranous, and
spongy urethra
Prostatic urethra ✅passes through prostate gland; transitional epithelium
Membranous urethra ✅in UG diaphragm, beyond the sphincter muscle- stratified
columnar epithelium
Spongy urethra ✅runs through penis; opens at external urethral orifice; opening is
stratified squamous epithelium
Female urethra ✅short, opens into anterior vagina vestibule; transitional epithelium up
to UG diaphragm
Perineum ✅divided into anal posterior triangle and urogenital anterior triangle
Urogenital triangle ✅contains UG diaphragm with sphincter muscles for urethra and
male/female external genitalia
Testes ✅male gonads found in scrotum
Seminiferous tubules ✅where sperm is produced; straight tubule goes into rete testis,
in which efferent ductules are that concentrate sperm and water reabsorption occurs;
ductules open into epididymis
Epididymis ✅where sperm is stored and matured
Vas deferens ✅pseudostratified columnar cell with cilia; contracts during ejaculation
and receives secretions from seminal vesicles and extends to prostate
Stoma of testes ✅contains interstitial leydig cells which are stimulated by LH and
produce androgen
Corpus cavernosa ✅erectile tissue of penis
Corpus spongiosum ✅surrounds the urethra
Tunica albuginea ✅capsule that surrounds each testis
, Sertoli cells ✅-nutrient transport to developing sperm cells
-bind FSH, secrete androgen binding protein to concentrate testosterone
-secrete inhibin
-blood testis barrier
Sertoli cell structure ✅-specialized epithelial cells that line seminiferous tubules
-attached to basement membrane that acts as barrier between blood vessels in
interstitial cells and spermatic cells
-smooth muscle to help contract and move sperm
Interstitial cells ✅in the testes, these cells lie between the seminiferous tubules and
produce the testosterone
Inhibin ✅inhibits secretion of FSH
Spermatogenesis ✅production of sperm; occurs in seminiferous tubules
Spermatogonial ✅dividing cells- one remains primordial germ cell and other divides to
continue on
Spermatocyte ✅full genetic composition; when it becomes secondary spermatocyte, it
is now haploid
Spermatid ✅an immature male sex cell formed from a spermatocyte that will develop
into sperm
Spermiogenesis ✅spermatids become sperm; acrosome cap develops and grows,
nucleus condenses, cytoplasm released
Maturation in the epididymis ✅-sperm learn how to swim and move
-decapitation factor is added
Prostate ✅glands surrounding prostatic urethra; secretions empty into it; site of
ejaculatory ducts
Transitional zone of prostate ✅mucous glands secreting into urethra
Central zone of prostate ✅submucosa like glands
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