Hormone which affects IC* ion
concentration?
a) GH
b) Thyroxine
c) Insulin
d) Estrogen
Correct Answer - C
Ans. C. Insulin
[Ref Guyton Ilth/e p.710]
Insulin lowers serum IC’ concentration i.e., causes hypokalemia. The
hypokalemic action of insulin is due to stimulation of K+ intake by
the cells mainly in muscle and adipose tissue. Insulin increases the
activity of Na+ - K. ATPase in cell membrane, so that more K+ is
pumped into cells.