Question

lo 6.3. what is the filtration process?
the movement of substances from the urethra into the bladder
the movement of substances from the kidney into the liver
the movement of substances from the nephron into the blood
the movement of substances from the bladder into the ureter
the movement of substances from the blood into the nephron

Explanation:

Filtration in the context of the nephron (the functional unit of the kidney) occurs when substances move from the blood (in the glomerulus) into the nephron (specifically the Bowman's capsule). This is the first step in urine formation. The other options are incorrect:

• Substances do not move from the urethra into the bladder (urine moves from bladder to urethra for excretion).
• There is no normal process of substances moving from kidney to liver in this context.
• Movement from nephron to blood is reabsorption, not filtration.
• Substances move from bladder to urethra (not ureter; ureters connect kidneys to bladder) for excretion.

Answer:

The movement of substances from the blood into the nephron