The per cent of Free or Ionized Calcium in the body is
Correct Answer: 50%
Description: (C) 50% # IONIZED CALCIUM:> Total calcium consists of free or ionized calcium (50%), calcium bound to protein (40-45%), principally albumin and calcium complexed to anions (5-10%), E.g. citrate, lactate, bicarbonate. Total calcium level does not give an indication of what is available at the cellular level.> Ionized calcium (iCa) is the form of calcium that is readily available to cells, and measurement of iCa is a more accurate reflection of the physiological calcium state.> Measurement of ionized calcium requires instrumentation with ion-specific electrodes. Unlike total calcium, ionized calcium is unaffected by albumin concentration, but it is affected by acid-base balance.> Acidosis (decreased pH) increases iCa, where as Alkalosis (increased pH) decreases iCa.> The pH of blood, serum or plasma changes rapidly with storage (usually decreases with refrigeration and increases with freezing), therefore iCa is unstable in stored blood samples.
Category:
Physiology
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now