Correct Answer: B

Rationale: The correct answer is B: Severe tenderness and swelling in the scrotum. Epididymitis is characterized by inflammation of the epididymis, causing symptoms such as severe tenderness and swelling in the scrotum. Choice A is incorrect as burning and pain on urination are more indicative of a urinary tract infection. Choice C, foul-smelling ejaculate and severe scrotal swelling, is not commonly associated with epididymitis. Choice D, foul-smelling urine and pain on urination, may indicate a urinary tract infection but are not specific to epididymitis.

Correct Answer: A

Rationale: The correct answer is A: 7.35-7.45. Plasma pH typically falls within this range for normal clients. A pH of 7.35-7.45 indicates a slightly alkaline to neutral environment, which is essential for various physiological processes to function optimally. Choices B, C, and D have pH values outside the normal range, indicating either acidic (B and C) or highly alkaline (D) conditions, which would be abnormal and potentially harmful to the body's functioning. Therefore, the normal range for plasma pH is crucial to maintain homeostasis and support overall health.

Correct Answer: A

Rationale: The correct answer is A: Filtration. Albumin is a large protein molecule that cannot pass through the semipermeable membrane of blood vessels. Therefore, the shift of body fluids associated with intravenous albumin administration occurs through the process of filtration, where fluid moves across the membrane due to a pressure difference. Osmosis (B) involves the movement of water across a semipermeable membrane, which is not the case for albumin. Diffusion (C) is the movement of molecules from an area of high concentration to low concentration, which is not how albumin moves. Active transport (D) requires energy to move substances against a concentration gradient, which is not the mechanism for albumin movement in the body.

Correct Answer: A

Rationale: The correct answer is A (5 to 10 mcg/ml) because this range is typically considered therapeutic for phenytoin (Dilantin) for seizure control. Levels below 5 mcg/ml may be subtherapeutic, leading to inadequate seizure control. Levels above 10 mcg/ml can increase the risk of toxicity. Choices B, C, and D are incorrect because they are outside the optimal therapeutic range, leading to either ineffective treatment (B, C) or an increased risk of adverse effects (D). Monitoring drug levels helps ensure the medication's effectiveness while minimizing side effects.

Correct Answer: B

Rationale: The correct answer is B: ELISA and Western Blot. The rationale is as follows: ELISA (enzyme-linked immunosorbent assay) and Western Blot are specific tests used to confirm HIV infection by detecting antibodies or antigens related to the virus. ELISA is the initial screening test, while Western Blot is the confirmatory test. These tests are highly sensitive and specific for HIV detection. Choice A is incorrect because CD4+ cell count and thymus function are not tests used to confirm HIV infection. They are used to monitor disease progression and immune function in HIV-positive individuals. Choice C is incorrect because B-cell and T-cell count are also not tests used to confirm HIV infection. They are indicators of immune system health but not specific for HIV diagnosis. Choice D is incorrect because while CD4+ and viral load tests are used in monitoring HIV progression, ELISA is the main confirmatory test for HIV diagnosis, and viral load is not typically used for initial