Nokea
At the level of the testicle, the straight tubules:
- A. are located inside the lobules;
- B. continue the convoluted seminiferous tubules;
- C. open in the rete testis;
- D. open in the epididymal duct;
Correct Answer: C
Rationale: The correct answer is C because the straight tubules open into the rete testis, which is a network of tubules located at the hilum of the testis. This is where sperm produced in the seminiferous tubules are collected and transported to the epididymis for maturation. The other choices are incorrect because A is not accurate as straight tubules are not located inside the lobules, B is incorrect as straight tubules are a separate structure from the convoluted seminiferous tubules, and D is inaccurate as straight tubules do not open directly into the epididymal duct.
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Estrogen is required for normal reproductive function in the male. Where is the principal site of estrogen synthesis in the male?
- A. Leydig cells
- B. Osteoblasts
- C. Liver cells
- D. Prostate cells
Correct Answer: C
Rationale: Rationale:
1. The correct answer is C: Liver cells. The liver is the principal site of estrogen synthesis in the male.
2. Liver cells contain the enzyme aromatase, which converts androgens into estrogens.
3. Estrogen plays a crucial role in maintaining normal reproductive function in males.
4. Leydig cells (Choice A) are responsible for testosterone production, not estrogen synthesis.
5. Osteoblasts (Choice B) are bone cells involved in bone formation, not estrogen synthesis.
6. Prostate cells (Choice D) are involved in prostate function, not estrogen synthesis.
If a woman has a tumor secreting large amounts of estrogen from the adrenal gland, which of the following will occur?
- A. Progesterone levels in the blood will be very low
- B. Her luteinizing hormone secretion rate will be totally suppressed
- C. She will not have normal menstrual cycles
- D. Her bones will be normally calcified
Correct Answer: B
Rationale: Correct Answer: B - Her luteinizing hormone secretion rate will be totally suppressed
Rationale:
1. The tumor secretes large amounts of estrogen, which can lead to negative feedback on the hypothalamus and pituitary gland.
2. Luteinizing hormone (LH) is crucial for ovulation and normal menstrual cycles.
3. High estrogen levels can suppress LH secretion, disrupting ovulation and menstrual cycles.
Summary of other choices:
A: Progesterone levels may actually be elevated due to the tumor-induced high estrogen levels.
C: The disruption of LH secretion can lead to abnormal menstrual cycles.
D: High estrogen levels can lead to bone loss due to inhibition of bone formation and increased bone resorption.
A client is asking the nurse questions about the diagnosis of endometriosis. The nurse teaches the client that endometrial tissue is found outside the uterus and that the major symptom that a client experiences is which of the following?
- A. Pain
- B. Infection
- C. Minimal bleeding
- D. Cramping
Correct Answer: A
Rationale: Pain is the primary symptom associated with endometriosis.
Which vitamin is essential for bone formation?
- A. A
- B. D
- C. B
- D. K
Correct Answer: B
Rationale: The correct answer is B: Vitamin D. Vitamin D is essential for bone formation as it helps the body absorb calcium, a key mineral for bone health. Without sufficient vitamin D, the body cannot effectively utilize calcium, leading to weakened bones. Vitamin A (Choice A) is important for vision and immune function, not specifically bone formation. Vitamin C (Choice C) is crucial for collagen synthesis but not directly involved in bone formation. Vitamin K (Choice D) plays a role in blood clotting and bone mineralization but is not as directly linked to bone formation as Vitamin D.
__________ is an example of an oviparous animal.
- A. Pigeon
- B. Elephant
- C. Sheep
- D. None of the above
Correct Answer: A
Rationale: The correct answer is A: Pigeon. Oviparous animals lay eggs to reproduce, like birds. Pigeons belong to the avian class, known for laying eggs. Elephants and sheep are viviparous mammals, giving birth to live young. "None of the above" is incorrect as pigeons are indeed oviparous.