ANSC 333 FINAL TEST PAPER 2026
QUESTIONS AND ANSWERS GRADED A
PLUS
◉ How often does the hypothalamus produce pulses of GnRH in the
male?
Answer: Every four to six hours
◉ What hormones are released from the anterior pituitary in
response to GnRH?
Answer: Follicle-stimulating hormone (FSH) and luteinizing
hormone (LH)
◉ What is the role of LH in male endocrinology?
Answer: It stimulates the production of testosterone from the testes.
◉ What type of cells in the testes produce testosterone?
Answer: Leydig cells
◉ What is dihydrotestosterone (DHT) and how is it formed?
,Answer: DHT is an androgen formed from testosterone in Sertoli
cells.
◉ What is the final steroidogenic product of the testes?
Answer: Testosterone, dihydrotestosterone, and small amounts of
estradiol.
◉ What feedback mechanism do testosterone and DHT exert on the
hypothalamus?
Answer: Negative feedback
◉ What hormone do Sertoli cells produce that has negative feedback
on FSH?
Answer: Inhibin
◉ What is the role of FSH in male gamete production?
Answer: It supports Sertoli cell function and aids in the production
of male gametes.
◉ How many primary hormones are involved in male gamete
production?
Answer: Seven primary hormones
,◉ What is the first stage of spermatogenesis?
Answer: Proliferative stage
◉ What occurs during the proliferative stage of spermatogenesis?
Answer: Spermatogonia undergo multiple rounds of mitotic
divisions.
◉ What is the empirical number of B spermatogonia produced from
one A1 spermatogonium?
Answer: Approximately 32 B spermatogonia
◉ What unique process allows continuous sperm production in
males?
Answer: Stem cell renewal
◉ What is the second stage of spermatogenesis?
Answer: Meiotic stage
◉ What is produced during meiosis in spermatogenesis?
Answer: Haploid sperm cells
◉ What is the significance of crossing over during meiosis?
, Answer: It provides genetic diversity among sperm cells.
◉ How many spermatids are typically produced from one A1
spermatogonium after meiosis?
Answer: Approximately 256 spermatids
◉ What is the third stage of spermatogenesis?
Answer: Differentiation stage
◉ What occurs during the differentiation stage of spermatogenesis?
Answer: Spermatids develop functional characteristics such as a
streamlined appearance and tail.
◉ What is the first phase of the differentiation stage?
Answer: Golgi phase
◉ What distinguishes male gamete production from female gamete
production?
Answer: Males continuously produce sperm after puberty, while
females are born with all oocytes.
◉ What is the role of Sertoli cells in spermatogenesis?
QUESTIONS AND ANSWERS GRADED A
PLUS
◉ How often does the hypothalamus produce pulses of GnRH in the
male?
Answer: Every four to six hours
◉ What hormones are released from the anterior pituitary in
response to GnRH?
Answer: Follicle-stimulating hormone (FSH) and luteinizing
hormone (LH)
◉ What is the role of LH in male endocrinology?
Answer: It stimulates the production of testosterone from the testes.
◉ What type of cells in the testes produce testosterone?
Answer: Leydig cells
◉ What is dihydrotestosterone (DHT) and how is it formed?
,Answer: DHT is an androgen formed from testosterone in Sertoli
cells.
◉ What is the final steroidogenic product of the testes?
Answer: Testosterone, dihydrotestosterone, and small amounts of
estradiol.
◉ What feedback mechanism do testosterone and DHT exert on the
hypothalamus?
Answer: Negative feedback
◉ What hormone do Sertoli cells produce that has negative feedback
on FSH?
Answer: Inhibin
◉ What is the role of FSH in male gamete production?
Answer: It supports Sertoli cell function and aids in the production
of male gametes.
◉ How many primary hormones are involved in male gamete
production?
Answer: Seven primary hormones
,◉ What is the first stage of spermatogenesis?
Answer: Proliferative stage
◉ What occurs during the proliferative stage of spermatogenesis?
Answer: Spermatogonia undergo multiple rounds of mitotic
divisions.
◉ What is the empirical number of B spermatogonia produced from
one A1 spermatogonium?
Answer: Approximately 32 B spermatogonia
◉ What unique process allows continuous sperm production in
males?
Answer: Stem cell renewal
◉ What is the second stage of spermatogenesis?
Answer: Meiotic stage
◉ What is produced during meiosis in spermatogenesis?
Answer: Haploid sperm cells
◉ What is the significance of crossing over during meiosis?
, Answer: It provides genetic diversity among sperm cells.
◉ How many spermatids are typically produced from one A1
spermatogonium after meiosis?
Answer: Approximately 256 spermatids
◉ What is the third stage of spermatogenesis?
Answer: Differentiation stage
◉ What occurs during the differentiation stage of spermatogenesis?
Answer: Spermatids develop functional characteristics such as a
streamlined appearance and tail.
◉ What is the first phase of the differentiation stage?
Answer: Golgi phase
◉ What distinguishes male gamete production from female gamete
production?
Answer: Males continuously produce sperm after puberty, while
females are born with all oocytes.
◉ What is the role of Sertoli cells in spermatogenesis?
