CALCIUM DISORDERS

Question 1

99 percent of calcium is stored in the bone in combination with…….

Answer 1

phosphorus

magnesium

Question 2

Calcium exists as three forms in the plasma………..

Answer 2

Ionic calcium(48%) that is the physiologically active component,

albumin bound (40%)

complexed with anions such as phosphate, sulfate, lactale, citrate and Bicarbonate(12%),

Question 3

Homeostatic mechanisms, chiefly maintained by ….

Answer 3

parathyroid hormone (PTH)

active vitamin D (1, 25 dihydroxyvitamin D)

Question 4

Hypocalcemia is defined as a total serum calcium concentration less than?……..

Answer 4

9 mg/dL.

Question 5

A common cause of pseudohypocalcemia is……..

Answer 5

Hypoalbuminemia

In which total serum calcium is low but the ionized fraction is not affected.