BLD 402: SEMINAL FLUID EXAM ACTUAL QUESTIONS AND
ANSWERS WITH COMPLETE SOLUTIONS GRADED A++
What occurs in the seminiferous tubules in the testicles?
Spermatogenesis (sperm production): spermatogonia (mitosis) ---> primary
spermatocyte (meiosis I) ---> secondary spermatocyte (meiosis II) ---> spermatids
(differentiate) ---> spermatozoa (sperm)
Which hormone does the differentiation step of spermatogenesis require?
Testosterone
Which 2 types of cells are located in the seminiferous tubules?
Sertoli cells & Leydig cells (interstitial cells)
What are the functions of sertoli cells?
-Support
-Controls movement of spermatocytes
-Blood-testis barrier
What is the function of Leydig cells?
Production/secretion of testosterone: regulated by luteinizing hormone (LH)
What are the functions of the epididymis?
-Store sperm until ejaculation
-Concentrate the fluid by absorption of lumen fluid
-Final maturation of sperm here; become motile
-Leukocyte infiltration and phagocytation of accumulated sperm
, What is the fuction of the vas deferens?
Connection between epididymis and ampulla (vasectomy cut and close here)
Which hormone is the seminal vesicle dependent on?
Testosterone
What is the function of the seminal vesicle?
Produce/store/secrete seminal vesicle fluid
Where does most ejaculate volume come from?
Seminal vesicle fluid, 70%
What are the components of seminal vesicle fluid?
-Fructose: nutrient for sperm (sperm cannot utilize glucose)
-Coagulum factors
-Flavin: cofactor for enzymes (electron transfer in redox reaction and source of grey-
opalescent color)
What is the function of the prostate gland?
Produce/store/secrete prostatic fluid
What percentage of ejaculate volume is made up of prostatic fluid?
25%
What are the components of prostatic fluid?
-Citrate: neutralizes vaginal acid
-Proteins/enzymes: coagulum factors and proteolytic enzymes (liquefaction)
-Zinc: regulation of coagulation and liquefaction enzyme activity and stabilizes
chromatin and membrane of sperm
What is the purpose of ejaculate coagulation?
ANSWERS WITH COMPLETE SOLUTIONS GRADED A++
What occurs in the seminiferous tubules in the testicles?
Spermatogenesis (sperm production): spermatogonia (mitosis) ---> primary
spermatocyte (meiosis I) ---> secondary spermatocyte (meiosis II) ---> spermatids
(differentiate) ---> spermatozoa (sperm)
Which hormone does the differentiation step of spermatogenesis require?
Testosterone
Which 2 types of cells are located in the seminiferous tubules?
Sertoli cells & Leydig cells (interstitial cells)
What are the functions of sertoli cells?
-Support
-Controls movement of spermatocytes
-Blood-testis barrier
What is the function of Leydig cells?
Production/secretion of testosterone: regulated by luteinizing hormone (LH)
What are the functions of the epididymis?
-Store sperm until ejaculation
-Concentrate the fluid by absorption of lumen fluid
-Final maturation of sperm here; become motile
-Leukocyte infiltration and phagocytation of accumulated sperm
, What is the fuction of the vas deferens?
Connection between epididymis and ampulla (vasectomy cut and close here)
Which hormone is the seminal vesicle dependent on?
Testosterone
What is the function of the seminal vesicle?
Produce/store/secrete seminal vesicle fluid
Where does most ejaculate volume come from?
Seminal vesicle fluid, 70%
What are the components of seminal vesicle fluid?
-Fructose: nutrient for sperm (sperm cannot utilize glucose)
-Coagulum factors
-Flavin: cofactor for enzymes (electron transfer in redox reaction and source of grey-
opalescent color)
What is the function of the prostate gland?
Produce/store/secrete prostatic fluid
What percentage of ejaculate volume is made up of prostatic fluid?
25%
What are the components of prostatic fluid?
-Citrate: neutralizes vaginal acid
-Proteins/enzymes: coagulum factors and proteolytic enzymes (liquefaction)
-Zinc: regulation of coagulation and liquefaction enzyme activity and stabilizes
chromatin and membrane of sperm
What is the purpose of ejaculate coagulation?
