Correct Answer: C

Rationale: The correct answer is C. Hormonal imbalances are the primary cause of BPH in aging males. As men age, testosterone levels decrease and estrogen levels may increase relative to testosterone, leading to prostate gland growth. This is why hormonal imbalances are more likely the cause of BPH in older males. Explanation of other choices: A: Chronic infection of the urinary tract does not directly cause BPH, although it can lead to similar symptoms such as urinary frequency and urgency. B: Chronic cigarette smoking is not a direct cause of BPH, although it can contribute to overall prostate health and exacerbate symptoms. D: Chronic obstruction of the bladder due to stone is a separate condition from BPH, although it can cause similar urinary symptoms.

Correct Answer: D

Rationale: The correct answer is D: menstrual flow. In a 28-year-old female with Cushing syndrome, excess cortisol levels can disrupt the menstrual cycle, leading to irregular or absent periods. Successful treatment for Cushing syndrome aims to restore normal cortisol levels, which should result in the resumption of regular menstrual flow. This indicates that the hormonal balance is improving. Now, let's analyze the other choices: A: Serum glucose level - While Cushing syndrome can lead to hyperglycemia, successful treatment would aim to normalize glucose levels, not cause a decline. B: Bone mineralization - Cushing syndrome can cause osteoporosis due to loss of bone density, but successful treatment would help prevent further bone loss rather than decline. C: Hair loss - Cushing syndrome can cause hair loss, but successful treatment would not necessarily lead to a decline in hair loss as it may take time for hair to regrow. Therefore, the correct answer is D as it directly relates to the restoration of hormonal

Correct Answer: C

Rationale: The correct answer is C because a decreased number of functioning acetylcholine receptor sites would result in the disease. Acetylcholine is a neurotransmitter that transmits signals between nerves and muscles. If there are fewer receptor sites for acetylcholine to bind to, this can lead to impaired nerve-muscle communication, causing the disease. Choice A is incorrect because a genetic defect in acetylcholine production would not directly affect the receptor sites. Choice B is incorrect because a reduced amount of acetylcholine would still be able to bind to the available receptor sites. Choice D is incorrect because inhibiting the enzyme Ache would not directly impact the receptor sites.

Correct Answer: B

Rationale: The correct answer is B because having the head of the bed at a 30-degree angle can cause the radioactive material to shift, potentially leading to an uneven distribution of radiation. This could result in harmful exposure to surrounding tissues. A: Maintaining the client on strict bed rest is important to prevent displacement of the radioactive applicator. C: Providing a complete bed bath each morning is necessary for hygiene and does not pose a radiation hazard. D: Checking the applicator's position every 4 hours is essential to ensure proper placement and does not indicate a radiation hazard.

Correct Answer: B

Rationale: The correct answer is B: Bence jones protein in the urine. In multiple myeloma, abnormal plasma cells produce excess monoclonal immunoglobulins, including Bence Jones proteins, which can be detected in the urine. This is a hallmark finding in multiple myeloma diagnosis. A: Incorrect. Serum creatinine levels are typically not affected in multiple myeloma. C: Incorrect. Hypercalcemia, not hypocalcemia, is commonly seen in multiple myeloma due to bone destruction. D: Incorrect. Multiple myeloma often presents with high serum protein levels, not low levels.