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Which gland produces thick, clear mucus that cleanses the penile urethra of acidic urine?
- A. Testes
- B. Seminal vesicles
- C. Prostate
- D. Bulbourethral glands
Correct Answer: D
Rationale: The correct answer is D: Bulbourethral glands. These glands produce thick, clear mucus that cleanses the penile urethra of acidic urine before ejaculation. This mucus helps neutralize the acidity of urine, creating a more hospitable environment for sperm to travel through. The other choices are incorrect because:
A: Testes produce sperm, not mucus.
B: Seminal vesicles produce a fluid rich in fructose to nourish sperm.
C: Prostate produces a milky fluid that aids in sperm motility.
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Which vitamin is essential for bone formation?
- A. A
- B. D
- C. B
- D. K
Correct Answer: B
Rationale: The correct answer is B: Vitamin D. Vitamin D is essential for bone formation as it helps the body absorb calcium, a key mineral for bone health. Without sufficient vitamin D, the body cannot effectively utilize calcium, leading to weakened bones. Vitamin A (Choice A) is important for vision and immune function, not specifically bone formation. Vitamin C (Choice C) is crucial for collagen synthesis but not directly involved in bone formation. Vitamin K (Choice D) plays a role in blood clotting and bone mineralization but is not as directly linked to bone formation as Vitamin D.
Of the following antibiotics, which one is used to treat chlamydia?
- A. Acyclovir
- B. Ciprofloxacin
- C. Tetracycline
- D. Ceftriaxone
Correct Answer: C
Rationale: Tetracycline is commonly used to treat chlamydia infections.
Which of the following tissues secrete proteolytic enzymes to liquefy semen?
- A. bulbourethral gland
- B. urethra
- C. prostate
- D. testis
Correct Answer: C
Rationale: The correct answer is C: prostate. The prostate gland secretes proteolytic enzymes such as prostate-specific antigen (PSA) to liquefy semen. This aids in sperm mobility and overall fertility. The other choices are incorrect because:
A: bulbourethral gland secretes a clear fluid to lubricate the urethra during sexual arousal.
B: urethra is a passageway for urine and semen but does not secrete proteolytic enzymes.
D: testis produces sperm cells but does not secrete enzymes to liquefy semen.
What is the function of the prolactin hormone?
- A. Prolactin promotes the production of milk from elements in the blood.
- B. Prolactin stimulates the development of alveoli.
- C. Prolactin stimulates increased production of tubules and ducts.
- D. Prolactin promotes the growth and development of the breasts' fatty tissue.
Correct Answer: A
Rationale: Prolactin is primarily responsible for milk production in the mammary glands.
The female reproductive system includes the following structures:
- A. ovary;
- B. Fallopian tubes;
- C. vagina;
- D. vulva;
Correct Answer: A
Rationale: The correct answer is A: ovary. The female reproductive system includes the ovaries, which are responsible for producing eggs and hormones like estrogen and progesterone. The Fallopian tubes are passageways for eggs to travel from the ovaries to the uterus, not a part of the system itself. The vagina is the birth canal and where sperm enters during intercourse, but it is not a reproductive organ. The vulva includes external genitalia like the labia and clitoris, but it is not a reproductive structure. Therefore, the ovary is the only structure directly involved in the reproductive process.