Final answer:
The correct statement indicating effective learning is that the patient will have increased serum creatinine levels in a case of acute kidney injury.
Step-by-step explanation:
The correct statement by the student nurse indicating effective learning is option C. "The patient will have increased serum creatinine levels."
Acute kidney injury is a condition where there is a sudden decrease in kidney function, leading to fluid and electrolyte changes. One of the hallmark indicators of acute kidney injury is an increase in serum creatinine levels, as the kidneys are not able to effectively filter waste products from the blood. Hypokalemia (option A) refers to decreased blood levels of potassium, which is not typically associated with acute kidney injury. Hypernatremia (option B) refers to higher-than-normal levels of sodium in the blood, which is also not typically associated with acute kidney injury. Decreased levels of blood urea nitrogen (option D) may be observed in acute kidney injury, but it is not a direct indicator.