Hyperkalemia with a normal total body potassium can be caused by which of the following?

Correct Answer: C

Rationale: Major trauma causes hyperkalemia due to cellular lysis, releasing potassium into the bloodstream without increasing total body stores. Conditions such as crush syndrome and tumor lysis syndrome also exhibit this pattern.

Correct Answer: D

Rationale: Both Anti-CCP and RF are antibodies commonly found in patients with Rheumatoid Arthritis, making 'All of the above' the correct answer.

Correct Answer: A

Rationale: Serious illness typically leads to tachycardia, increased respiratory effort, and use of accessory muscles, while blood pressure may drop in shock.

Correct Answer: C

Rationale: Acute leukemia commonly presents with fever (due to infections), pallor (from anemia), and purpura (from thrombocytopenia). Bone pain and lymphadenopathy are also common but not as defining as this triad.

Correct Answer: D

Rationale: Osler's nodes are painful, tender nodules found on fingers and toes, caused by immune complex deposition in infective endocarditis.