Nokea
Spermatogenesis:
- A. occurs in several stages;
- B. includes stages of meiosis I;
- C. includes stages of meiosis II;
- D. it is stimulated by the FSH;
Correct Answer: A
Rationale: Correct Answer: A
Rationale: Spermatogenesis is a complex process involving several stages such as mitosis, meiosis, and maturation. It starts with the division of spermatogonia through mitosis, followed by meiosis I and II to form haploid spermatids. These spermatids then undergo maturation to become spermatozoa. Therefore, spermatogenesis occurs in several stages, making choice A the correct answer.
Summary of Incorrect Choices:
B: While spermatogenesis does involve meiosis, it includes both meiosis I and II, not just meiosis I.
C: Spermatogenesis includes both meiosis I and II, not just meiosis II.
D: Spermatogenesis is primarily regulated by hormones such as testosterone and LH, not FSH.
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What is line “D” pointing to?
- A. Follicular fluid
- B. Germinal epithelium
- C. Ovarian cortex
- D. Ovarian medulla
Correct Answer: D
Rationale: The correct answer is D: Ovarian medulla. Line "D" is pointing to the inner region of the ovary known as the medulla, which contains blood vessels, nerves, and connective tissue. This is confirmed by the location and characteristics of the structures in that region.
Explanation:
1. Follicular fluid (Choice A) is found within the follicles in the ovarian cortex, not in the medulla.
2. Germinal epithelium (Choice B) is the outermost layer of the ovary, whereas the medulla is located deeper within the ovary.
3. Ovarian cortex (Choice C) is the outer layer of the ovary where follicles develop, while the medulla is the inner region.
In summary, the correct answer is D (Ovarian medulla) as it accurately identifies the inner region of the ovary where blood vessels and connective tissue are located, distinguishing it from the other choices.
Which of the following sets of tissues are all part of a developing follicle.
- A. granulosa cells, theca, corpus luteum
- B. theca, acrosome, antrum
- C. oocyte, corpus luteum, granulosa cells
- D. . zona pellucida, cumulus oophorous, theca
Correct Answer: D
Rationale: The correct answer is D because all the tissues mentioned (zona pellucida, cumulus oophorous, theca) are indeed part of a developing follicle. The zona pellucida is the glycoprotein layer surrounding the oocyte, the cumulus oophorous is a cluster of granulosa cells surrounding the oocyte, and the theca is a layer of connective tissue surrounding the follicle.
Choice A is incorrect because the corpus luteum is not part of a developing follicle. Choice B is incorrect because the acrosome is a structure in sperm, not the follicle. Choice C is incorrect because the corpus luteum is not part of a developing follicle, and the oocyte is already present within the follicle but is not considered a part of it.
Trabecular bone is otherwise called as
- A. Compact bone
- B. Cortical bone
- C. Spongy bone
- D. None of the abov
Correct Answer: C
Rationale: Trabecular bone, also known as spongy bone, is characterized by its porous structure with trabeculae. It is found at the ends of long bones and inside flat bones. Spongy bone provides structural support and flexibility. Compact bone (A) is dense and forms the outer layer of bones. Cortical bone (B) is synonymous with compact bone. Choice D is incorrect as trabecular bone is specifically known as spongy bone.
Which of the following is the primary sign of breast cancer?
- A. A bloody discharge from the nipple
- B. A dimpling of the skin over the lesion
- C. A retraction of the nipple
- D. A painless mass in the breast
Correct Answer: D
Rationale: A painless mass is often the first noticeable sign of breast cancer.
Which statement about the ovary is not true:
- A. it is a pair organ;
- B. it is a gland with mixed role;
- C. it is oval-shaped;
- D. it is located in the right flank
Correct Answer: D
Rationale: The correct answer is D because the ovary is not located in the right flank; it is located in the lower abdomen. A: The ovary is a pair organ, as there are two ovaries in the female reproductive system. B: The ovary is a gland with mixed roles, producing hormones and releasing eggs. C: The ovary is oval-shaped, which is anatomically correct. Therefore, choice D is incorrect as the ovary is not located in the right flank.