The process(es) carried out by the renal tubule is (are):
A)reabsorption
B)secretion
C)both A and B
D)both A and B and filtration

Question

Quizplus · Accepted Answer

The renal tubule is responsible for both reabsorption and secretion processes. Reabsorption involves the movement of useful substances (such as glucose, amino acids, and electrolytes) from the filtrate back into the bloodstream, while secretion involves the active transport of waste products (such as drugs and excess ions) from the bloodstream into the filtrate for eventual excretion. Therefore, both options A and B are correct. However, option D is incorrect as it also includes filtration, which is a separate process that occurs in the renal corpuscle, before the filtrate enters the renal tubule.

The Process(es) Carried Out by the Renal Tubule Is (Are)