Question

1. the cell membrane has selective permeability (is semipermeable). what types of molecules can pass through easily, and which cannot? give one example of each. 6. label the bilayer, a carbohydrate, the hydrophilic region, the hydrophobic region, and a protein in this diagram of the plasma membrane.

Explanation:

1. Small non - polar molecules like oxygen ($O_2$) can pass through easily due to their ability to dissolve in the lipid bilayer. Large polar molecules like glucose cannot pass easily as the lipid bilayer is hydrophobic and repels them.
2. In the plasma membrane diagram, the heads of the phospholipid bilayer are the hydrophilic region (facing outward towards water), the tails of the phospholipid bilayer are the hydrophobic region (facing inward away from water), and integral membrane proteins are embedded in the bilayer.

Answer:

1. Molecules that can pass easily: Oxygen ($O_2$); Molecules that cannot pass easily: Glucose
2. Hydrophilic region: Heads of phospholipid bilayer; Hydrophobic region: Tails of phospholipid bilayer; Protein: Integral membrane protein