UTA A&P II CH. 28 REPRODUCTIVE
SYSTEM. EXAM QUESTIONS AND
ANSWERS 100% PASS 2026/2027
What has 1/2 the number of chromosomes in somatic cells? - ANS Gamete
How many chromosomes are a gamete? - ANS 23
How many chromosomes are in a somatic cell? - ANS 46
Are sperm/egg haploid or diploid cells? - ANS haploid
What is the term for when gametes join to form a zygote? - ANS fertilization
How many chromosomes do zygotes have? - ANS 46
How do human zygotes divide to copy all 46 chromosomes and make a baby? - ANS mitosis
Term for sperm production? - ANS spermatogenesis
@2026 ALLRIGHTS RESERVED 1
,What is the term for egg production? - ANS oogenesis
List in order the pathway of the sperm from the testes out of the body. - ANS testis,
epididymis, ductus deferens, ejaculatory duct, urethra
What is the external genitalia that encloses the testes? - ANS scrotum
What is the erectile organ that contains distal portion of the urethra? - ANS Penis
What organs are located in the scrotum? - ANS Testes
The testes are divided into 2 chambers called the ___ ____ - ANS Scrotal cavities
Do the testes form inside or outside of the body? - ANS inside
What is the layer of smooth muscle found in the dermis of the scrotum? - ANS Dartos Muscle
What causes the characteristic wrinkling of the scrotal surface and tightens up to reduce surface
area (protects against heat loss)? - ANS dartos muscle
What is the layer of skeletal muscle deep to the dermis of the penis? - ANS cremaster muscle
What is the muscle that tenses the scrotum and pulls testes closer to the body? -
ANS cremaster muscle
Sperm develop at 2-3F higher or lower than body temperature? - ANS lower
@2026 ALLRIGHTS RESERVED 2
, What coils inside of the testes and produces sperm? - ANS seminiferous tubules
What is the loop formed by the seminiferous tubules that creates a network of passageways? -
ANS rete testis
What connects the rete testis to the epididymis? - ANS efferent ductiles
What are the interstitial cells within the CT surrounding the seminiferous tubules? - ANS Cells
of Leydig
How long does spermatogenesis take from start to finish? - ANS 9 weeks
Spermatogenesis begins in the ___ ____ and proceeds to the lumen. - ANS seminiferous
tubules
Spermatogonia (stem cells)- divide by mitosis to produce two daughter cells:
One remains as _______ and the Second differentiates into primary spermatocyte. -
ANS Spermatogonia
What are the stem cells of spermatogenesis? - ANS spermatogonia
Spermatogonia (stem cells)- divide by mitosis to produce two daughter cells:
One remains as spermatogonia and the Second differentiates into primary _____/ -
ANS spermatocyte
Which spermatocytes begin meiosis? (meiosis I) - ANS Primary spermatocytes-
@2026 ALLRIGHTS RESERVED 3
SYSTEM. EXAM QUESTIONS AND
ANSWERS 100% PASS 2026/2027
What has 1/2 the number of chromosomes in somatic cells? - ANS Gamete
How many chromosomes are a gamete? - ANS 23
How many chromosomes are in a somatic cell? - ANS 46
Are sperm/egg haploid or diploid cells? - ANS haploid
What is the term for when gametes join to form a zygote? - ANS fertilization
How many chromosomes do zygotes have? - ANS 46
How do human zygotes divide to copy all 46 chromosomes and make a baby? - ANS mitosis
Term for sperm production? - ANS spermatogenesis
@2026 ALLRIGHTS RESERVED 1
,What is the term for egg production? - ANS oogenesis
List in order the pathway of the sperm from the testes out of the body. - ANS testis,
epididymis, ductus deferens, ejaculatory duct, urethra
What is the external genitalia that encloses the testes? - ANS scrotum
What is the erectile organ that contains distal portion of the urethra? - ANS Penis
What organs are located in the scrotum? - ANS Testes
The testes are divided into 2 chambers called the ___ ____ - ANS Scrotal cavities
Do the testes form inside or outside of the body? - ANS inside
What is the layer of smooth muscle found in the dermis of the scrotum? - ANS Dartos Muscle
What causes the characteristic wrinkling of the scrotal surface and tightens up to reduce surface
area (protects against heat loss)? - ANS dartos muscle
What is the layer of skeletal muscle deep to the dermis of the penis? - ANS cremaster muscle
What is the muscle that tenses the scrotum and pulls testes closer to the body? -
ANS cremaster muscle
Sperm develop at 2-3F higher or lower than body temperature? - ANS lower
@2026 ALLRIGHTS RESERVED 2
, What coils inside of the testes and produces sperm? - ANS seminiferous tubules
What is the loop formed by the seminiferous tubules that creates a network of passageways? -
ANS rete testis
What connects the rete testis to the epididymis? - ANS efferent ductiles
What are the interstitial cells within the CT surrounding the seminiferous tubules? - ANS Cells
of Leydig
How long does spermatogenesis take from start to finish? - ANS 9 weeks
Spermatogenesis begins in the ___ ____ and proceeds to the lumen. - ANS seminiferous
tubules
Spermatogonia (stem cells)- divide by mitosis to produce two daughter cells:
One remains as _______ and the Second differentiates into primary spermatocyte. -
ANS Spermatogonia
What are the stem cells of spermatogenesis? - ANS spermatogonia
Spermatogonia (stem cells)- divide by mitosis to produce two daughter cells:
One remains as spermatogonia and the Second differentiates into primary _____/ -
ANS spermatocyte
Which spermatocytes begin meiosis? (meiosis I) - ANS Primary spermatocytes-
@2026 ALLRIGHTS RESERVED 3
