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Bio 446l Summer Exam 5 Study Questions and Correct Answers
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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; ...

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  • August 15, 2024
  • 7
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • bio 446l summer exam 5 study questions and correct
  • male urethra carries semen and urine composed of
  • prostatic urethra passes through prostate gland

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  • BIO 446

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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

Seminal vesicles ✅secretes fructose (for motility), prostaglandins and clotting proteins
(keep sperm together)

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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