Answer:
Active Transport
Explanation:
Tubular secretion allows hydrogen ions, and penicillin to be excreted in the distal convoluted tubule. These molecules moved across through a process called active transport.
In Active transport there is movement of ions or molecules from a region of lower concentration to the region of higher concentration through a permeable membrane (cell membrane) with the help of enzymes and energy. So, similar is the process for tubular secretion.
