问题
单项选择题
Which of the following signs and symptoms would be an early indication that the client's serum potassium level is below normal
A．Diarrhea.
B．Tingling in the fingers.
C．Sticky mucous membranes.
D．Muscle weakness in the legs.
答案
参考答案：D
解析：An early indication of hypokalemia is muscle weakness in the legs. Potassium is essential for proper neuromuscular impulse transmission. When neuromuscular impulse transmission is impaired, as in hypokalemia, leg muscles become weak and flabby. If hypokalemia progresses, respiratory muscles become involved and the client becomes apneic. Hypokalemia also causes electrocardiogram changes.