Nokea
Which gland surrounds the upper portion of the urethra just below the junction with the urinary bladder?
- A. Ejaculatory
- B. Seminal vesicles
- C. Bulbourethral
- D. Prostate
Correct Answer: D
Rationale: The correct answer is D: Prostate. The prostate gland surrounds the upper portion of the urethra just below the junction with the urinary bladder. It secretes a fluid that makes up a significant portion of semen. The other choices are incorrect because:
A: Ejaculatory gland is not a correct anatomical structure.
B: Seminal vesicles are located behind the bladder and contribute to semen production.
C: Bulbourethral glands are located at the base of the penis and secrete a lubricating fluid during arousal.
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Testosterone is secreted by the following structures, EXCEPT:
- A. prostate;
- B. testicular interstitial cells;
- C. seminiferous tubules;
- D. straight tubules;
Correct Answer: A
Rationale: The correct answer is A: prostate. Testosterone is primarily secreted by the testicular interstitial cells (Leydig cells) in the testes. The seminiferous tubules are responsible for spermatogenesis, not testosterone secretion. Straight tubules are involved in transporting sperm. The prostate gland produces prostatic fluid, not testosterone. Therefore, the prostate is not a structure that secretes testosterone.
The first polar body appears in the:
- A. primary oocyte just before ovulation
- B. primary oocyte after birth
- C. secondary oocyte after fertilization
- D. primary oocyte before birth
Correct Answer: D
Rationale: The correct answer is D because the first polar body is formed during the first meiotic division of the primary oocyte before birth. The primary oocyte undergoes meiosis I to form the secondary oocyte and the first polar body. This process occurs during fetal development, not after birth.
Choice A is incorrect because the primary oocyte completes meiosis I to form the secondary oocyte and the first polar body before ovulation.
Choice B is incorrect because the primary oocyte forms the first polar body before birth, not after birth.
Choice C is incorrect because the first polar body is formed during meiosis I of the primary oocyte, not after fertilization.
A man is taking a number of medications, one of which appears to be interfering with the emission phase of the sexual act. Which of the following medications could cause this problem?
- A. A medication that prolongs the duration of action of nitric oxide
- B. A medication that blocks the smooth muscle receptors for nitric oxide
- C. A medication that increases the release of nitric oxide
- D. A testosterone-like androgen compound
Correct Answer: B
Rationale: The correct answer is B because blocking the smooth muscle receptors for nitric oxide would interfere with vasodilation necessary for an erection during the emission phase of the sexual act. Choice A would actually enhance the effects of nitric oxide, Choice C would increase nitric oxide release which would typically improve sexual function, and Choice D, a testosterone-like androgen compound, would not directly affect the emission phase related to nitric oxide.
Choose the statement that is NOT TRUE:
- A. Fragmentation is followed by regeneration.
- B. The offspring from asexual reproduction is genetically identical.
- C. The embryo of ovoviviparous gets nourishment from the egg yolk.
- D. Crossing-over occurs between sister chromatids of homologous chromosomes.
Correct Answer: D
Rationale: The correct answer is D because crossing-over occurs between non-sister chromatids of homologous chromosomes during meiosis, not between sister chromatids. This genetic exchange results in genetic variation. Fragmentation is followed by regeneration in some organisms, asexual reproduction produces genetically identical offspring, and ovoviviparous embryos do get nourishment from the egg yolk.
Which statement by Mrs. Carson would indicate to you that she does NOT have a complete understanding of the self breast examination technique?
- A. I do the examination every month a few days after my period.'
- B. I use my fingertips to examine all of the breast tissues.'
- C. I begin the examination by inspecting my breasts with hands at my side.'
- D. I especially check the upper, outer quadrant and under my arms.'
Correct Answer: C
Rationale: Beginning the examination by inspecting the breasts with hands at the side is not the correct technique; hands should be raised above the head.