A condition of excessive amounts of potassium in the blood is termed:

A) hypercalcemia.
B) hyperglycemia.
C) hyperkalemia.
D) hyperinsulinism.

Hyperkalemia is a condition in which potassium levels in the blood are abnormally high. This can lead to muscle weakness, heart rhythm disturbances, and even cardiac arrest. Hypercalcemia (A) is an excessive amount of calcium in the blood. Hyperglycemia (B) is an abnormally high blood glucose level. Hyperinsulinism (D) is a condition in which the pancreas produces too much insulin, leading to low blood sugar levels, not high potassium levels.