Final answer:
The root 'kal' in hyperkalemia refers to potassium. Hyperkalemia is a condition characterized by high levels of potassium in the blood, leading to cardiac and nervous system issues, including periodic paralysis or weakness.
Step-by-step explanation:
The student's question pertains to the medical term hyperkalemia where the root 'kal' refers to potassium. Hyperkalemia is a condition characterized by an excessively high level of potassium in the bloodstream, which can lead to periodic paralysis or weakness, primarily affecting the cardiac and central nervous systems. These symptoms are associated with the increased levels of potassium in the plasma, rather than within the cells. It's important to understand that while the body needs a certain level of potassium to function properly, too much potassium can be harmful and lead to serious health issues such as hyperkalemia.