Multiple choice

The principle of purification of blood in kidney is ___________.

  1. filtration

  2. diffusion

  3. osmosis

  4. reabsorption

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The primary mechanism for blood purification in the kidney is ultrafiltration, which occurs in the glomerulus. While reabsorption and secretion also occur, filtration is the initial and defining principle of blood purification.