Which one of the following is correct with reference to haemodialysis?

Options

A. Absorbs and resends excess of ions
B. The dialysis unit has a coiled cellophane tube
C. Blood is pumped back through a suitable artery after haemodialysis
D. Nitrogenous wastes are removed by active transport

Answer

B

Explanation

Haemodialysis is done in the patients whose kidneys become completely non-functional. Haemodialysis is the process of diffusion across a semipermeable membrane to remove unwanted substances from the blood while adding desirabel components. The dialysis unit consists of a coiled cellophane tube kept in the dialysing fluid. the membrane of the tube is impermeable to blood cells and proteins but permeable to urea, uric acid, creatinine and mineral ions.