Biology for IGCSE & O level - Excretion In Humans (Section 3 - No. 24)
Which of the following happens during filtration in the kidney?
Blood pressure forces small molecules out of the blood.
Useful substances are reabsorbed.
Waste molecules are removed from the blood.
Blood cells and large proteins pass into the filtrate.
Explanation
During filtration, high blood pressure forces small molecules and wastes through the filtration membrane. Blood cells and large proteins are retained in the blood.
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