Question

2. In what direction are substances moving during the process of secretion? Explain what these substances are and why they are excreted from the body.

Answer 1

They move in the path from the bloodstream into the tubules, which is in the backward direction of reabsorption. These substances are K+ ions, H+ ions, NH4+ ions, creatinine, urea, some hormones, and some drugs. They are concealed because they can pretend as a natural toxin to us if unnecessary amounts are stored in inside the body.

Answer 2

they trace a path from the pharynx to the anus being absorbed all the nutrients is secreted in the stool, this is because the substance has no more nutrient to provide the body