Every question gives you a panel with the reference ranges printed beside the values, and asks what it shows. Nothing here is a recall question — the numbers are on the page, and the work is reading them. That is also how the exam itself behaves: reference ranges are supplied, and they are taught as approximate and lab-dependent on purpose, so what is being tested is the DIRECTION of an abnormality and the pattern several values make together. Chemistry and urinalysis are together because they answer the same questions from two directions — the serum sodium and the urine specific gravity are both about water, the bicarbonate and the urine pH are both about acid, and the rhabdomyolysis and hemolysis items only resolve when you read the dipstick and the serum at once. There is no arithmetic beyond the anion gap, which is the one calculation the lecture asks for out loud.
Answers reveal only after you choose. Your score and a breakdown by objective appear at the end, with a review of everything you missed.