Which of the following is an isotonic solution?

a. 0.09% NaCl
b. 0.90% NaCl
c. 9.00% NaCl
d. 19.0% NaCl


ANS: B
Average body cellular fluid has a tonicity equal to a 0.9% solution of sodium chloride (NaCl; sometimes referred to as physiologic saline). Solutions with similar tonicity are called isotonic.

Health Professions

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