Abnormally increased blood levels of sodium are termed:

a. hyperkalemia

b. hypercalcemia

c. hypernatremia

d. hypercalcemia

The correct option is : c. hypernatremia

Explanation:

Hypernatremia is a medical condition in which the concentration of sodium is abnormally high in the blood. The major symptom of hypernatremia is excessive thirst. The early symptoms of this condition include nausea, fatigue and loss of appetite and severe symptoms include spasms, confusion and bleeding around or in the brain.

Answer: Option C."hypernatremia"

Explanation:

Hypernatremia is defined as the a electrolyte problem in which sodium concentration rises to a value more than 145 mmol/L in serum.

The major symptoms of hypernatremia involves thirst, muscle twitching or spasms, and confusion.

Hypernatremia is a hyperosmolar condition caused by a decrease in total body water (TBW) against electrolyte content and several causes of hypernatremia includes intake of hypertonic fluid, salt poisoning in children, and inadequate intake of free water associated with total body sodium depletion et cetera.

Hence, the correct option is C.