Nokea
Where does spermatogenesis occur?
- A. Interstitial cells.
- B. Seminal vesicles.
- C. Seminiferous tubules.
- D. Vas deferens.
Correct Answer: C
Rationale: The correct answer is C: Seminiferous tubules. Spermatogenesis is the process of sperm production, which occurs in the seminiferous tubules of the testes. These tubules contain specialized cells called Sertoli cells and spermatogonia that undergo multiple stages of cell division and maturation to form spermatozoa. Interstitial cells (A) produce testosterone, seminal vesicles (B) secrete seminal fluid, and vas deferens (D) is the duct that carries sperm from the testes to the urethra but is not the site of spermatogenesis.
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Regarding lactation
- A. Milk production is controlled by prolactin
- B. The co-exist of estrogen and prolactin is antagonistic
- C. Nipple is lubricated by sebaceous gland
- D. Myoepithelial cell contraction facilitate ejection of milk
Correct Answer: A
Rationale: The correct answer is A because milk production is indeed controlled by prolactin, a hormone secreted by the anterior pituitary gland. Prolactin stimulates the alveoli in the breast to produce milk. Option B is incorrect because estrogen and prolactin actually work synergistically to promote lactation. Option C is incorrect as the nipple is lubricated by Montgomery glands, not sebaceous glands. Option D is incorrect because myoepithelial cell contraction helps in milk ejection, not in milk production.
Which of the following suggestions should a nurse give a client with a prostate cancer to deal with his impotency?
- A. Abstain from any sexual activity.
- B. Demonstrate sexual feelings in ways other than intercourse.
- C. Practice sexual intercourse at least two to three times daily until successful.
- D. Perform pelvic floor retraining exercises.
Correct Answer: B
Rationale: Exploring alternative ways to express intimacy can help cope with impotence.
The general meaning of the term "corpus" is best described by which of the following?
- A. Abdomen
- B. Body
- C. Death
- D. Head
Correct Answer: B
Rationale: The correct answer is B: Body. Corpus commonly refers to a collection of written or spoken texts, which together form a body of work. "Body" is the best choice as it encompasses the idea of a collection or group of related items. A is incorrect as it refers specifically to the abdomen, not the general term. C, Death, and D, Head, are unrelated to the general meaning of "corpus" as they do not convey the idea of a body or collection.
Choose the CORRECT statement regarding events that occur in metaphase II.
- A. Sister chromatids may no longer be identical to each other.
- B. Homologous chromosomes line up at metaphase plat
- C. Crossing over between homologous chromosomes occurs.
- D. Homologous chromosomes begin to separat
Correct Answer: A
Rationale: Correct Answer: A - Sister chromatids may no longer be identical to each other.
Rationale:
1. In metaphase II, sister chromatids align at the metaphase plate.
2. During meiosis II, sister chromatids separate and move to opposite poles.
3. Due to potential crossing over in meiosis I, sister chromatids may not be identical in meiosis II.
4. This variability contributes to genetic diversity in the resulting gametes.
Summary:
B: Homologous chromosomes do not line up in metaphase II; they already separated in meiosis I.
C: Crossing over occurs in meiosis I, not in meiosis II.
D: Homologous chromosomes start to separate in anaphase I, not metaphase II.
A surge of FSH and LH is induced in the adenohypophysis 24 hours before ovulation and the first meiotic division of the primary oocyte resumes. At what stage does the oocyte become arrested until it becomes fertilized?
- A. First meiotic division, prophase
- B. First meiotic division, metaphase
- C. Second meiotic division, prophase
- D. Second meiotic division, metaphase
Correct Answer: D
Rationale: The correct answer is D: Second meiotic division, metaphase. After the surge of FSH and LH induces the first meiotic division to resume, the oocyte becomes arrested at the metaphase stage of the second meiotic division until fertilization. This arrest allows for the completion of meiosis upon fertilization. Choices A and B are incorrect because the oocyte does not become arrested at the prophase or metaphase of the first meiotic division. Choice C is incorrect because the oocyte does not become arrested at the prophase of the second meiotic division, but rather at the metaphase stage.