Nokea
The male reproductive system arises from
- A. Paramesonephric (Mullerian) ducts
- B. Mesonephric (Wolffian) ducts
- C. FSH
- D. aldosterone
Correct Answer: B
Rationale: The correct answer is B: Mesonephric (Wolffian) ducts. The male reproductive system arises from the mesonephric ducts, which develop into structures like the epididymis, vas deferens, and seminal vesicles. The mesonephric ducts are responsible for transporting sperm from the testes to the urethra. The other choices are incorrect because A (Paramesonephric ducts) develop into the female reproductive system, C (FSH) is a hormone involved in the regulation of reproductive processes but does not directly give rise to the male reproductive system, and D (aldosterone) is a hormone involved in electrolyte balance and has no role in male reproductive system development.
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Regarding spermatogenesis, we can state the following:
- A. it occurs at the level of testicular interstitial cells;
- B. it occurs at the level of the Leydig cells;
- C. it occurs at the level of the convoluted seminiferous tubules;
- D. it begins around the age of 14;
Correct Answer: C
Rationale: The correct answer is C because spermatogenesis occurs within the convoluted seminiferous tubules of the testes. This is where sperm cells are produced through a series of cell divisions and maturation processes. Choice A is incorrect as spermatogenesis does not occur at the level of testicular interstitial cells, which are responsible for hormone production. Choice B is also incorrect as Leydig cells are responsible for testosterone production, not sperm production. Choice D is incorrect as spermatogenesis actually begins during puberty, typically around the age of 12-13, not specifically at the age of 14.
Which one of the following is NOT a (vas) deferens, epididymis, component of semen?
- A. sperm
- B. epididymis, seminal glands
- C. seminal fluid
- D. prostatic fluid
Correct Answer: A
Rationale: The correct answer is A: sperm. Sperm is not a component of semen; it is the male reproductive cell. Semen is composed of fluids from the epididymis, seminal glands, and prostate, which provide nourishment, protection, and transportation for sperm. The epididymis stores and matures sperm, seminal glands produce seminal fluid, and the prostate contributes prostatic fluid. Sperm is only a part of semen and not a component of it. Therefore, choice A is the correct answer.
Which hormone thickens the lining of the uterus?
- A. FSH
- B. estrogen
- C. LH
- D. progesterone
Correct Answer: B
Rationale: The correct answer is B: estrogen. Estrogen is responsible for thickening the lining of the uterus during the menstrual cycle in preparation for implantation of a fertilized egg. Follicle-stimulating hormone (FSH) stimulates the growth of ovarian follicles. Luteinizing hormone (LH) triggers ovulation. Progesterone helps maintain the uterine lining during the second half of the menstrual cycle. Estrogen plays a key role in the initial thickening of the uterine lining, making it the correct choice.
Which of the following cells may eventually become spermatozoa?
- A. Sertoli cells
- B. Sustentacular cells
- C. Spermatogonia
- D. Chief cells
Correct Answer: C
Rationale: The correct answer is C: Spermatogonia. Spermatogonia are the male germ cells that undergo mitosis to produce more spermatogonia or differentiate into primary spermatocytes, which eventually develop into spermatozoa through meiosis. Sertoli cells (A) and Sustentacular cells (B) are somatic cells within the testes that support and nourish developing sperm cells, but they do not give rise to spermatozoa. Chief cells (D) are typically found in the stomach and are responsible for producing pepsinogen, unrelated to sperm production.
A male client is having trouble with erections and comes to the clinic to be seen by the doctor. The doctor diagnoses the client with erectile dysfunction. The nurse provides education regarding the disorder and teaches the client that erectile dysfunction can be caused by which of the following?
- A. Obsessive compulsive disorder
- B. Complications of STIs
- C. Side effects of drug therapy
- D. Spinal stenosis
Correct Answer: C
Rationale: Drug side effects are a common cause of erectile dysfunction.