Question

Contact lens solution is balanced with the salts in the cells of the eye at about 0.9% salt to about 99.1% water. Contact lens solution is said to be a(n) ______________ solution.

Answer 1

Isotonic solution
This is a solution in which there is no net movement of water into our out of the cell when a cell is placed in this solution. The solution is also dilute.

Answer 2

The right answer is isotonic (compared to the cell of the eye).

Two liquids are isotonic when they have the same osmotic pressure with the same concentration of dissolved substances. Isotonia is the intermediate state between hypertonic and hypotonic solutions.

A muscle contraction is isotonic when the force remains constant. Isotonic contraction is called concentric when the muscle contracts while shortening or eccentric when the muscle contracts while lengthening.