Some invertebrates can move gases across their cell's membrane by ___ through interstitial fluid.
A) active transport
B) facilitated diffusion
C) bulk transport
D) simple diffusion
E) osmosis

Question

Quizplus · Accepted Answer

Invertebrates with simple body plans lack specialized respiratory structures, such as gills or lungs, and therefore rely on simple diffusion of gases (e.g. oxygen and carbon dioxide) across their cell membranes. This diffusion occurs through the interstitial fluid that surrounds their cells. This is the only option that accurately describes the exchange of gases in invertebrates without specialized respiratory structures.

Some Invertebrates Can Move Gases Across Their Cell's Membrane by ___