Final answer:
Hyperkalemia is defined as an elevated blood level of potassium when the serum concentration is 5.5mEq/L or higher. It can impair the function of skeletal muscles, the nervous system, and the heart.
Step-by-step explanation:
Hyperkalemia is defined as an elevated blood level of potassium, which occurs when the serum concentration is 5.5mEq/L or higher.
Hyperkalemia can have serious effects on the function of skeletal muscles, the nervous system, and the heart. It can lead to impaired muscle function, mental confusion, numbness, and weakened respiratory muscles.
The correct answer to the question is A. True. When the serum concentration of potassium is 5.5mEq/L or higher, hyperkalemia is present.