What condition is characterized by low blood levels of calcium?

The condition characterized by low blood levels of calcium is tetany. Tetany refers to the involuntary contraction of muscles that can occur due to insufficient calcium levels in the blood, a condition known as hypocalcemia. Calcium is essential for various physiological processes, including muscle contraction, nerve transmission, and blood coagulation. When calcium levels drop significantly, it can lead to increased neuromuscular excitability, resulting in muscle spasms or cramps, which are hallmark symptoms of tetany.

Understanding tetany in the context of its relationship to calcium levels highlights the importance of maintaining proper calcium homeostasis for muscle and nerve function, illustrating why low calcium levels can lead to such a condition.