What term means the passage of a solute through a membrane?

• A. Dialysis
• B. Diarrhea
• C. Diathermy
• D. Diplopia

Answer: (A)

Dialysis describes the movement of a solute through a membrane. It involves a semipermeable barrier that allows small particles to pass from an area of higher concentration to one of lower concentration, often driven by diffusion and sometimes aided by pressure in clinical settings. In medicine, dialysis is used to remove waste products from blood when the kidneys aren’t functioning properly, mimicking how natural membranes filter solutes.

The other terms refer to completely different ideas: diarrhoea is frequent, watery stools; diathermy is the use of high-frequency electrical currents to generate deep tissue heat; diplopia means double vision.