A substance is present in a concentration of 2mg% in the afferent arteriole and zero mg% in the efferent. True about the substance is: (A) It is free filtered in glomerulus, (B) Secreted in cortical nephron, (C) Absorbed in PCT, (D) Impermeable in loop of Henle
Answer is A. Afferent arteriole was having the substance. After it passed through the glomerulus, in the efferent arteriole it is absent. That means all of it was filtered out through the glomerulus.