ATI LPN
ATI LPN Test Bank
Fluid Electrolyte Balance and Nutritional Needs Questions
Question 1 of 5
The most common cause of hyperkalemia is
Correct Answer: D
Rationale: Cell damage releases intracellular potassium into the extracellular fluid, causing hyperkalemia.
Question 2 of 5
Calcitonin
Correct Answer: D
Rationale: Calcitonin lowers blood calcium by inhibiting bone resorption.
Question 3 of 5
Loss of a large volume of sweat will
Correct Answer: D
Rationale: Sweat loss reduces plasma volume, increasing osmolality.
Question 4 of 5
Which of the following is not a buffer system of the body?
Correct Answer: D
Rationale: NaCl does not buffer pH; it's an electrolyte, not a buffer.
Question 5 of 5
Which of the following can play a role in buffering the pH of urine?
Correct Answer: D
Rationale: All three (ammonia, bicarbonate, phosphate) buffer urine pH by binding H⁺.