Nokea
The pituitary LH controls:
- A. ovulation;
- B. the progesterone secretion
- C. the activity of the corpus albicans;
- D. follicular maturation;
Correct Answer: A
Rationale: The correct answer is A: ovulation. Pituitary LH (Luteinizing Hormone) is responsible for triggering ovulation in the menstrual cycle. LH surge leads to the release of the mature egg from the ovarian follicle. The other choices are incorrect because: B: progesterone secretion is mainly regulated by the hormone progesterone itself and not directly by pituitary LH; C: the corpus albicans is a remnant of the ruptured ovarian follicle and is not directly controlled by LH; D: follicular maturation is primarily regulated by FSH (Follicle-Stimulating Hormone) rather than LH.
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The seminal vesicle:
- A. is located above the prostate;
- B. is a pair organ;
- C. is located medially from the deferent ducts;
- D. has endocrine role, generating the seminal fluid;
Correct Answer: B
Rationale: The correct answer is B because the seminal vesicle is indeed a pair organ, meaning there are two of them in the male reproductive system. They are located posterior to the urinary bladder and are responsible for producing and secreting a significant portion of the seminal fluid.
Choice A is incorrect because the seminal vesicles are located behind the bladder, not above the prostate. Choice C is incorrect as the seminal vesicles are located laterally, not medially from the deferent ducts. Choice D is incorrect because the seminal vesicle is not an endocrine organ; it has an exocrine function in producing seminal fluid.
To detect and diagnose genital tumors at an early stage, Mrs. Yashimoto should be instructed to have an annual examination that includes
- A. a Pap smear
- B. a pelvic examination
- C. gonadotropic titer studies
- D. vaginal smears for estrogen activity
Correct Answer: A
Rationale: Pap smears are essential for early detection of cervical cancer.
Sperm production begins in the
- A. seminiferous tubules
- B. epididymis
- C. vas deferens
- D. ejaculatory duct
Correct Answer: A
Rationale: The correct answer is A: seminiferous tubules. Sperm production starts in the seminiferous tubules of the testes through a process called spermatogenesis, involving the division and maturation of germ cells. The other choices, B: epididymis, C: vas deferens, and D: ejaculatory duct, are incorrect as they are not sites of sperm production but rather play roles in sperm storage, transport, and ejaculation, respectively. The seminiferous tubules are specifically designed for sperm production, making them the correct choice in this context.
Regarding male reproductive system
- A. Hypospodiasis is caused by the failure of urethral groove to close
- B. The connection between tunica vaginalis and abdominal cavity close after the descendant of testis
- C. SRY protein causes the Wolffian duct to regress
- D. Ampulla of fallopian tube is the commonest site for fertilization
Correct Answer: C
Rationale: The correct answer is C because the SRY protein is responsible for causing the regression of the Wolffian duct in male development. This process leads to the formation of male reproductive structures such as the vas deferens. The other choices are incorrect because:
A: Hypospadias is actually caused by the incomplete closure of the urethral groove during development.
B: The connection between the tunica vaginalis and the abdominal cavity closes after the descent of the testis, not before.
D: The ampulla of the fallopian tube is not involved in male reproduction; it is actually the site of fertilization in the female reproductive system.
Which glands produce a thick, yellowish secretion that nourishes and activates sperm?
- A. Bulbourethral glands
- B. Prostate
- C. Seminal vesicles
- D. Ejaculatory duct
Correct Answer: C
Rationale: The correct answer is C: Seminal vesicles. Seminal vesicles produce a thick, yellowish secretion that provides nutrients and activates sperm. This secretion, along with sperm from the testes, forms semen. Bulbourethral glands produce a clear, viscous fluid that lubricates the urethra during sexual arousal (not yellowish). The prostate gland secretes a milky fluid that neutralizes acidic vaginal secretions. The ejaculatory duct is a passageway for semen to travel from the vas deferens to the urethra and does not produce any secretions. Therefore, the seminal vesicles are the correct answer as they specifically produce the described yellowish secretion that nourishes and activates sperm.