Why does the frog's reliance on cutaneous respiration make it acutely sensitive to water pollution?

Answer

Because it absorbs substances directly from the water it lives in through its permeable skin.

Due to its reliance on skin breathing, the frog's skin acts like a sponge, absorbing nearly everything dissolved in the lake water, leading to systemic poisoning, reproductive failure, and death.

Why does the frog's reliance on cutaneous respiration make it acutely sensitive to water pollution?
speciesendangeredamphibianfrog