Which ion channel is effected in hypokalemic periodic paralysis?: (A) K+, (B) Na+, (C) CI-, (D) Ca2+
Answer is D. Hypokalemic periodic paralysis is due to calcium channel mutations. Hypokalemic periodic paralysis, in which serum potassium drops during a paralytic episode, is the most common of the inherited periodic paralyses. Ref Davidson 23rd edition pg 366