Final answer:
The correctly spelled term is 'dialysis,' a critical medical process for patients with kidney failure, using a semipermeable membrane to filter waste from the blood.
Step-by-step explanation:
The term that is spelled correctly is b. dialysis.
Dialysis is a medical process that involves the use of a semipermeable membrane to remove waste products such as urea from the blood. This is especially important for patients with kidney illnesses who use dialysis machines. The semipermeable membrane allows small solute molecules and solvent molecules to pass through but not large solute molecules like proteins.
For instance, during hemodialysis, a patient's blood is passed through a tube in a dialysis machine, and waste products are filtered out as the blood comes in contact with the dialysate across a semipermeable membrane. Red blood cells are too large to pass through these membranes and are thus retained in the bloodstream, while smaller molecules like urea are filtered out.