Dialysis: Understanding Passive Transport in Medical Filtration

Dialysis is a passive transport process.

Passive transport does not require energy input. It occurs when molecules move from an area of high concentration to an area of low concentration through a selectively permeable membrane.

- In the case of dialysis, the selectively permeable membrane is the dialysis membrane, and the molecules that move are solutes such as urea and creatinine.

Active transport, on the other hand, requires energy input to move molecules against a concentration gradient, from an area of low concentration to an area of high concentration.

- An example of active transport is the sodium-potassium pump, which uses energy from ATP to move sodium ions out of cells and potassium ions into cells.