Nokea
Human chorionic gonadotropin (hCG) produces fluid that activates sperm.
- A. prostatic urethra
- B. ovary.
- C. prostate
- D. corpus luteum.
Correct Answer: D
Rationale: The correct answer is D: corpus luteum. Human chorionic gonadotropin (hCG) is produced by the developing placenta during pregnancy. This hormone helps maintain the corpus luteum, which in turn produces progesterone to support the pregnancy. The fluid produced by the corpus luteum helps activate sperm for fertilization. Choices A, B, and C are incorrect as they are not directly involved in the production of hCG or the activation of sperm.
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Which hormone is secreted by the corpus luteum after ovulation?
- A. Progesterone
- B. Relaxin
- C. LH
- D. FSH
Correct Answer: A
Rationale: The correct answer is A: Progesterone. After ovulation, the corpus luteum forms from the ruptured follicle and secretes progesterone to prepare the uterus for implantation. Progesterone helps maintain the endometrial lining for potential pregnancy. Choice B, Relaxin, is secreted by the corpus luteum, but its main function is to soften the cervix and pubic symphysis. Choices C and D, LH and FSH respectively, are pituitary hormones involved in the menstrual cycle regulation, not directly secreted by the corpus luteum.
Which of the following hormone stimulates the development of corpus luteum?
- A. Estrogen
- B. Progesterone
- C. Luteinizing hormone (LH)
- D. Follicle stimulating hormone (FSH)
Correct Answer: C
Rationale: The correct answer is C: Luteinizing hormone (LH). LH is responsible for stimulating the development of the corpus luteum after ovulation. It triggers the release of the egg from the follicle and promotes the transformation of the follicle into the corpus luteum, which is crucial for the production of progesterone. Estrogen (A) is involved in the development of the follicle, not the corpus luteum. Progesterone (B) is produced by the corpus luteum, not responsible for its development. FSH (D) is primarily involved in stimulating the growth of ovarian follicles, not the formation of the corpus luteum.
Failure of the ductus arteriosus to close is a common developmental defect. Which of the following would likely be present in a 12-month-old infant with patent ductus arteriosus?
- A. Below-normal arterial PO2
- B. Below-normal arterial PCO2
- C. Greater than normal arterial blood pressure
- D. Lower than normal pulmonary arterial pressure
Correct Answer: A
Rationale: The correct answer is A: Below-normal arterial PO2. In a 12-month-old infant with patent ductus arteriosus, there would likely be a left-to-right shunt causing increased blood flow to the lungs, leading to decreased systemic blood flow. This can result in decreased systemic oxygenation and below-normal arterial PO2 levels. Choices B, C, and D are incorrect because patent ductus arteriosus does not directly affect arterial PCO2, arterial blood pressure, or pulmonary arterial pressure in a way that would lead to those specific outcomes at this age.
In educating a male patient about testicular cancer, the nurse includes which statement?
- A. The highest incidence of this cancer is in men between 20 and 34 years of age.
- B. The incidence of this cancer is correlated with human papillomavirus (HPV) infection.
- C. The risk of this cancer increases with multiple sexual partners.
- D. This type of cancer more commonly affects uncircumcised males.
Correct Answer: A
Rationale: Step 1: The correct answer is A because testicular cancer has the highest incidence in men between 20 and 34 years of age, making it crucial to educate this age group.
Step 2: Choice B is incorrect as testicular cancer is not correlated with HPV; it is more associated with undescended testicles.
Step 3: Choice C is incorrect as there is no direct link between the number of sexual partners and testicular cancer risk.
Step 4: Choice D is incorrect as circumcision status is not a significant factor in the development of testicular cancer.
Which of the following cells secrete testosterone
- A. spermatocytes
- B. oocytes
- C. anterior pituitary cells
- D. leydig cells
Correct Answer: D
Rationale: Rationale:
1. Leydig cells are located in the testes and are responsible for secreting testosterone.
2. Testosterone is a male sex hormone crucial for the development of male reproductive tissues.
3. Spermatocytes and oocytes are involved in gamete production, not testosterone secretion.
4. Anterior pituitary cells secrete hormones like FSH and LH, not testosterone.
Summary:
Leydig cells secrete testosterone in the testes, making them the correct choice. Spermatocytes, oocytes, and anterior pituitary cells are not involved in testosterone secretion.