Question

scenario 2: contact lens solution is salty in order to match your tears. q1. tonicity of the solution? q2. how do the cells respond? q3. what question could you ask confirm?

Explanation:

Q1

Tonicity relates to solute concentration relative to a cell. Tears and contact lens solution (salty to match tears) have equal solute concentrations to cells (like eye cells). Isotonic solutions have equal solute concentrations, so no net water movement. Since the solution matches tears (which are isotonic to eye cells), the contact lens solution is isotonic.

In an isotonic solution, the solute concentration inside and outside the cell (e.g., eye cells) is equal. This means the osmotic pressure is balanced, so there is no net movement of water across the cell membrane. Thus, cells maintain their normal shape and size (no shrinking or swelling).

To confirm tonicity, we can ask about the effect on cells or solute concentration. For example, asking if cells placed in the solution retain their normal shape (since isotonic solutions don't cause shape change) or if the solute concentration of the solution equals that of tear fluid (or eye cell cytoplasm) would help confirm it's isotonic. A specific question could be: "If we place a sample of eye cells (or a similar cell type) in this contact lens solution, do the cells maintain their original size and shape?"

Answer:

The tonicity of the contact lens solution is isotonic.

Q2