BIOL 252 | BIOL252 Module 8: Human Anatomy &
Physiology II with Lab Updated and Latest
Questions and Correct Answers with Rationale -
Portage Learning
1. Where specifically does spermatogenesis occur in the male reproductive system?
A. Epididymis
B. Seminal vesicles
C. Vas deferens
D. Seminiferous tubules
Correct Answer: D
Explanation: Spermatogenesis takes place within the seminiferous tubules located inside
the testes. These tubules contain the germ cells and Sertoli cells necessary for sperm
development. The epididymis is actually the site where sperm mature and gain motility
after being produced. The vas deferens functions primarily as a conduit to transport sperm
toward the urethra. Seminal vesicles contribute nutritional fluid to the semen but do not
produce sperm.
2. Which hormone is primarily responsible for stimulating the interstitial (Leydig) cells to
produce testosterone?
A. Follicle-stimulating hormone (FSH)
B. Inhibin
C. Luteinizing hormone (LH)
D. Gonadotropin-releasing hormone (GnRH)
Correct Answer: C
Explanation: Luteinizing hormone (LH) targets the Leydig cells in the testes to trigger
testosterone synthesis. Testosterone is vital for maintaining male secondary sex
characteristics and supporting sperm production. FSH, on the other hand, targets Sertoli
cells to promote spermatogenesis directly. Inhibin is a feedback hormone that specifically
inhibits FSH secretion from the pituitary. GnRH is the hypothalamus-derived hormone that
stimulates the release of both LH and FSH.
3. During the ovarian cycle, what event is triggered by a massive surge in Luteinizing Hormone
(LH)?
A. Menstruation
B. Implantation
,C. Ovulation
D. Follicular recruitment
Correct Answer: C
Explanation: A significant spike in LH levels mid-cycle is the direct trigger for the release
of the secondary oocyte, known as ovulation. This surge occurs roughly 24 to 36 hours
before the egg is expelled from the Graafian follicle. Menstruation is caused by a drop in
progesterone and estrogen, not an LH surge. Implantation refers to the blastocyst attaching
to the uterine wall about a week after fertilization. Follicular recruitment occurs at the start
of the cycle under the influence of FSH.
4. Which layer of the uterus is shed during the menstrual phase of the uterine cycle?
A. Stratum functionalis
B. Perimetrium
C. Stratum basalis
D. Myometrium
Correct Answer: A
Explanation: The stratum functionalis is the superficial layer of the endometrium that
thickens and then sloughs off during menstruation. This shedding occurs when
progesterone levels decline at the end of the luteal phase. The stratum basalis is the deeper
layer that remains intact to regenerate the functionalis layer. The myometrium is the thick
middle layer of smooth muscle responsible for contractions. The perimetrium is the
outermost serous layer of the uterine wall.
5. What is the primary function of the acrosome located on the head of a sperm cell?
A. To provide energy for motility
B. To store the genetic material
C. To penetrate the protective layers of the oocyte
D. To anchor the sperm to the vaginal wall
Correct Answer: C
Explanation: The acrosome contains digestive enzymes like hyaluronidase that allow the
sperm to penetrate the corona radiata and zona pellucida of the oocyte. This enzymatic
reaction is a critical step in the fertilization process. Energy for motility is provided by
mitochondria located in the sperm’s midpiece, not the acrosome. The nucleus of the sperm
head contains the actual genetic material for inheritance. There is no biological anchoring
mechanism for sperm to the vaginal wall.
, 6. Following ovulation, the remaining follicular cells transform into which structure?
A. Zygote
B. Corpus albicans
C. Primary follicle
D. Corpus luteum
Correct Answer: D
Explanation: After the oocyte is released, the collapsed follicle transforms into the corpus
luteum under the influence of LH. This structure acts as a temporary endocrine gland that
secretes high levels of progesterone. If pregnancy does not occur, it eventually degrades
into a scar-like tissue called the corpus albicans. A primary follicle is an early stage of egg
development seen at the beginning of the cycle. A zygote is the single cell formed by the
union of sperm and egg.
7. Which hormone is detected by standard over-the-counter pregnancy tests?
A. Estrogen
B. Progesterone
C. Human chorionic gonadotropin (hCG)
D. Prolactin
Correct Answer: C
Explanation: Human chorionic gonadotropin (hCG) is produced by the trophoblast cells of
the developing embryo shortly after implantation. Its presence in urine or blood is a
definitive physiological marker of pregnancy. hCG maintains the corpus luteum so that
progesterone production continues to support the pregnancy. Estrogen and progesterone
are present in both pregnant and non-pregnant cycles, making them unreliable markers.
Prolactin is primarily involved in milk production after childbirth.
8. In the female reproductive tract, where does fertilization typically occur?
A. Uterine cavity
B. Vaginal canal
C. Ampulla of the fallopian tube
D. Ovary surface
Correct Answer: C
Explanation: Fertilization most commonly takes place in the ampulla, which is the widest
section of the fallopian tube. This location allows the zygote enough time to travel and
develop before reaching the uterus for implantation. The uterine cavity is where the
blastocyst eventually implants, not where the sperm meets the egg. The vaginal canal is the
Physiology II with Lab Updated and Latest
Questions and Correct Answers with Rationale -
Portage Learning
1. Where specifically does spermatogenesis occur in the male reproductive system?
A. Epididymis
B. Seminal vesicles
C. Vas deferens
D. Seminiferous tubules
Correct Answer: D
Explanation: Spermatogenesis takes place within the seminiferous tubules located inside
the testes. These tubules contain the germ cells and Sertoli cells necessary for sperm
development. The epididymis is actually the site where sperm mature and gain motility
after being produced. The vas deferens functions primarily as a conduit to transport sperm
toward the urethra. Seminal vesicles contribute nutritional fluid to the semen but do not
produce sperm.
2. Which hormone is primarily responsible for stimulating the interstitial (Leydig) cells to
produce testosterone?
A. Follicle-stimulating hormone (FSH)
B. Inhibin
C. Luteinizing hormone (LH)
D. Gonadotropin-releasing hormone (GnRH)
Correct Answer: C
Explanation: Luteinizing hormone (LH) targets the Leydig cells in the testes to trigger
testosterone synthesis. Testosterone is vital for maintaining male secondary sex
characteristics and supporting sperm production. FSH, on the other hand, targets Sertoli
cells to promote spermatogenesis directly. Inhibin is a feedback hormone that specifically
inhibits FSH secretion from the pituitary. GnRH is the hypothalamus-derived hormone that
stimulates the release of both LH and FSH.
3. During the ovarian cycle, what event is triggered by a massive surge in Luteinizing Hormone
(LH)?
A. Menstruation
B. Implantation
,C. Ovulation
D. Follicular recruitment
Correct Answer: C
Explanation: A significant spike in LH levels mid-cycle is the direct trigger for the release
of the secondary oocyte, known as ovulation. This surge occurs roughly 24 to 36 hours
before the egg is expelled from the Graafian follicle. Menstruation is caused by a drop in
progesterone and estrogen, not an LH surge. Implantation refers to the blastocyst attaching
to the uterine wall about a week after fertilization. Follicular recruitment occurs at the start
of the cycle under the influence of FSH.
4. Which layer of the uterus is shed during the menstrual phase of the uterine cycle?
A. Stratum functionalis
B. Perimetrium
C. Stratum basalis
D. Myometrium
Correct Answer: A
Explanation: The stratum functionalis is the superficial layer of the endometrium that
thickens and then sloughs off during menstruation. This shedding occurs when
progesterone levels decline at the end of the luteal phase. The stratum basalis is the deeper
layer that remains intact to regenerate the functionalis layer. The myometrium is the thick
middle layer of smooth muscle responsible for contractions. The perimetrium is the
outermost serous layer of the uterine wall.
5. What is the primary function of the acrosome located on the head of a sperm cell?
A. To provide energy for motility
B. To store the genetic material
C. To penetrate the protective layers of the oocyte
D. To anchor the sperm to the vaginal wall
Correct Answer: C
Explanation: The acrosome contains digestive enzymes like hyaluronidase that allow the
sperm to penetrate the corona radiata and zona pellucida of the oocyte. This enzymatic
reaction is a critical step in the fertilization process. Energy for motility is provided by
mitochondria located in the sperm’s midpiece, not the acrosome. The nucleus of the sperm
head contains the actual genetic material for inheritance. There is no biological anchoring
mechanism for sperm to the vaginal wall.
, 6. Following ovulation, the remaining follicular cells transform into which structure?
A. Zygote
B. Corpus albicans
C. Primary follicle
D. Corpus luteum
Correct Answer: D
Explanation: After the oocyte is released, the collapsed follicle transforms into the corpus
luteum under the influence of LH. This structure acts as a temporary endocrine gland that
secretes high levels of progesterone. If pregnancy does not occur, it eventually degrades
into a scar-like tissue called the corpus albicans. A primary follicle is an early stage of egg
development seen at the beginning of the cycle. A zygote is the single cell formed by the
union of sperm and egg.
7. Which hormone is detected by standard over-the-counter pregnancy tests?
A. Estrogen
B. Progesterone
C. Human chorionic gonadotropin (hCG)
D. Prolactin
Correct Answer: C
Explanation: Human chorionic gonadotropin (hCG) is produced by the trophoblast cells of
the developing embryo shortly after implantation. Its presence in urine or blood is a
definitive physiological marker of pregnancy. hCG maintains the corpus luteum so that
progesterone production continues to support the pregnancy. Estrogen and progesterone
are present in both pregnant and non-pregnant cycles, making them unreliable markers.
Prolactin is primarily involved in milk production after childbirth.
8. In the female reproductive tract, where does fertilization typically occur?
A. Uterine cavity
B. Vaginal canal
C. Ampulla of the fallopian tube
D. Ovary surface
Correct Answer: C
Explanation: Fertilization most commonly takes place in the ampulla, which is the widest
section of the fallopian tube. This location allows the zygote enough time to travel and
develop before reaching the uterus for implantation. The uterine cavity is where the
blastocyst eventually implants, not where the sperm meets the egg. The vaginal canal is the
