Physiological saline solution is isotonic with which of the following?

Question

Physiological saline solution is isotonic with which of the following? Choose ALL that apply.

distilled water

0.92% (m/v) sodium chloride

5.0% (m/v) sodium chloride

0.92% (m/v) glucose

red blood cell fluid

5.0% (m/v) glucose

Answer 1

0.92% (m/v) sodium chloride (9.2 g/L x 1 mol/58 g = 0.16 M NaCl = 0. 32 M total)

red blood cell fluid (contains ~0.9% NaCl inside the cell)

5.0% (m/v) glucose (50 g/L x 1 mol/180 g = 0.28 M glucose = 0.28 M total)