Correct Answer: A

Rationale: The correct answer is A: fluid volume deficit related to depletion of intravascular volume. Peritonitis causes inflammation of the peritoneum, leading to fluid shifting into the peritoneal cavity, causing hypovolemia. Hypotension and tachycardia are signs of decreased intravascular volume. Rigid abdominal muscles and rebound tenderness indicate peritoneal irritation. Choice B is incorrect because elevated ammonia levels are not associated with the client's symptoms. Choice C is incorrect because increased peristalsis does not explain the client's hypotension and tachycardia. Choice D is incorrect because malabsorption does not align with the client's acute presentation of severe abdominal pain and peritonitis.

Correct Answer: A

Rationale: Rationale: 1. Digital rectal exam (DRE) and PSA test are recommended by major health organizations for prostate cancer screening in men over 50. 2. DRE helps detect abnormalities in the prostate, while PSA test measures the levels of a protein produced by the prostate gland. 3. Prostate cancer can be asymptomatic in its early stages, so regular screening is crucial for early detection and treatment. 4. Transrectal ultrasound is not a primary screening method for prostate cancer. 5. Testicular self-exams are for detecting testicular cancer, not prostate cancer. 6. CBC, BUN, and creatinine levels are not specific tests for prostate cancer screening.

Correct Answer: A

Rationale: The correct answer is A: Measure the client’s oral temperature. This is the best follow-up because it directly assesses the client's body temperature, providing objective data to confirm the presence of fever. It is essential to gather accurate information to guide appropriate interventions. Asking a colleague for assistance (B) may not address the immediate need for temperature assessment. Giving the client a clean gown and warm blankets (C) may provide comfort but does not address the need for temperature measurement. Obtaining an order for blood cultures (D) is not the initial priority when the client is showing signs of fever; temperature measurement is the first step in assessing the client's condition.

Correct Answer: A

Rationale: Rationale for Correct Answer (A): Prostate-specific antigen (PSA) is a protein produced by the prostate gland. It is primarily used to screen for prostate cancer by measuring the levels of PSA in the blood. PSA levels can help detect prostate cancer early. Therefore, choice A is the correct answer as it accurately describes PSA and its primary use. Summary of Incorrect Choices: B: Protein serum antigen is not a commonly known term in healthcare. There is no specific antigen called "protein serum antigen" used to determine protein levels. C: Pneumococcal strep antigen is a bacterial antigen that causes pneumonia, not related to PSA used in prostate cancer screening. D: Papanicolua-specific antigen is not a recognized term. The Papanicolaou test (Pap smear) is used for cervical cancer screening, not a specific antigen like PSA.

Correct Answer: D

Rationale: The correct answer is D: Hyperosmolar solutions used primarily to reverse negative nitrogen balance. Rationale: 1. Hyperalimentation solutions are designed to provide essential nutrients intravenously. 2. Hyperosmolar solutions have a higher osmolarity compared to body fluids, providing concentrated nutrition. 3. Negative nitrogen balance occurs when the body breaks down more protein than it synthesizes, requiring additional protein intake. 4. Hyperosmolar solutions can provide adequate protein and nutrients to reverse negative nitrogen balance. Summary: A: Hypotonic solutions do not increase osmotic pressure, but rather decrease it. B: Hypertonic solutions are not primarily used for hydration in this context. C: Alkalizing solutions are not the primary purpose of hyperalimentation and do not directly address cellular sweating.