Add labels to the figure that follows, which illustrates some molecules that can and cannot pass through cell membranes unaided.

Verified step by step guidance

1. Identify the molecules shown in the images. The first image shows water molecules (H2O) and a large, complex molecule (likely a polysaccharide or protein). The second image shows various molecules and their pathways through the cell membrane.
2. Label the water molecules in the first image as 'Water (H2O)' and the large complex molecule as 'Large Molecule (e.g., Polysaccharide or Protein)'.
3. In the second image, identify and label the different pathways: simple diffusion, facilitated diffusion, and active transport. Simple diffusion involves small nonpolar molecules passing directly through the lipid bilayer. Facilitated diffusion involves molecules passing through a channel protein. Active transport involves molecules being pumped through a carrier protein using energy (ATP).
4. Label the small nonpolar molecules passing through the lipid bilayer as 'Simple Diffusion'.
5. Label the molecules passing through the channel protein as 'Facilitated Diffusion' and the molecules being pumped through the carrier protein as 'Active Transport'.