A client's laboratory reports show marked deficiencies of both serum sodium and potassium. On the
basis of this finding, the nurse should assess the client for symptoms of electrical conduction
problems
a. throughout the body.
b. in skeletal muscle function only.
c. in the central nervous system only.
d. in the cardiac conduction system only.
ANS: A
The brain is involved in mental activity, maintenance of homeostasis, and control of all
physiological functions. Brain neuronal activity involves conducting electrical impulses from one
end of the cell to the other, involving inward movement of sodium followed by outward movement
of potassium. Without sufficient sodium and potassium, electrical conduction of impulses is
impaired. Physical and mental symptoms result.
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