Tubular secretion A) refers to the movement of a substance from the peritubular capillary blood into the tubular lumen B) can occur by active or passive transport mechanisms C) of K⁺ occurs in the distal and collecting tubules and is stimulated by aldosterone D) of organic anions and cations occurs in the proximal tubule by two distinct types of carriers E) all of these

Question

Quizplus · Accepted Answer

All of the statements are true. Tubular secretion is the movement of a substance from the peritubular capillary blood into the tubular lumen and can occur by active or passive transport mechanisms. K⁺ is an organic anion and cation that undergoes secretion in the distal and collecting tubules and is stimulated by aldosterone. Moreover, the secretion of organic anions and cations, like penicillin and creatinine, occurs in the proximal tubule by two distinct types of carriers.

Tubular Secretion