Biology for IGCSE & O level - Excretion In Humans (Section 3 - No. 38)
Which of the following statements correctly describes the process of secretion in the kidney?
Movement of substances from the blood into the kidney tubules.
Movement of substances from the kidney tubules back into the blood.
Filtration of blood in the glomerulus.
Formation of urine in the bladder.
Explanation
Secretion is the movement of substances, like some drugs and excess ions, from the blood into the kidney tubules.
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