Physiology A substance is present in concentration of 2 mg% in the afferent aeriole and zero mg% in the efferent. TRUE about the substance is: A It is free filtered in glomerulus B Secreted in coical nephron C Absorbed in PCT D Impermeable in loop of Henk 💡 Explanation A substance is present in concentration of 2 mg% in the afferent aeriole and zero mg% in the efferent. TRUE about the substance is: ✓ Correct Answer: A. It is free filtered in glomerulus