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Arrange the steps involved in the hemodialysis process:
I. Addition of anticoagulant (heparin) to the blood drained from a convenient artery.
II. Removal of nitrogenous waste from the blood.
III. Passage of the blood through a coiled porous cellophane membrane of a tube immersed in dialysis fluid.
IV. Mixing of the blood with an antiheparin substance and its subsequent passage into a vein.
Choose the correct sequence of steps:
I → II → III → IV
IV → III → II → I
I → III → II → IV
I → IV → II → III
Answers (1)
Option 3, I → III → II → IV, represents the correct sequence of steps in the hemodialysis process.
Step I involves the addition of an anticoagulant (heparin) to the blood drained from a convenient artery. This helps prevent blood clotting during the procedure.
Step III involves the passage of the blood through a coiled porous cellophane membrane of a tube immersed in dialysis fluid. This allows for the exchange of solutes and waste products between the blood and the dialysis fluid.
Step II involves the removal of nitrogenous waste from the blood. This occurs as the blood passes through the dialysis membrane, allowing waste products to diffuse out of the blood and into the dialysis fluid.
Step IV involves the mixing of the blood with an antiheparin substance and its subsequent passage into a vein. This step helps counteract the effects of heparin and ensures the blood can flow safely back into the patient's circulation.
By following the sequence I → III → II → IV, the hemodialysis process is carried out effectively, allowing for the removal of waste products and the restoration of proper blood composition. Hence, the correct answer is option 3.
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