Tubular secretion
A) involves transepithelial transport.
B) is the movement of a substance from the peritubular capillary blood into the tubular fluid.
C) always occurs by active transport.
D) both (a) and (b) above.
E) both (b) and (c) above.

Question

Quizplus · Accepted Answer

Tubular secretion involves transepithelial transport (A) and is the movement of substances from the peritubular capillary blood into the tubular fluid (B). It does not always occur by active transport, so C is incorrect.

Tubular Secretion