Question

question which of the following molecules will passively pass through the membrane? select all that apply fatty acids carbon dioxide sodium ion glucose

Explanation:

1. Fatty acids: They are non - polar and can pass through the lipid - bilayer of the cell membrane via simple diffusion (a type of passive transport) because the lipid - bilayer is also non - polar.
2. Carbon dioxide: It is a small, non - polar molecule. It can pass through the cell membrane by simple diffusion (passive transport) as it moves from an area of high concentration to low concentration.
3. Sodium ion: Sodium ions are charged (polar) and cannot pass through the non - polar lipid - bilayer of the cell membrane by passive transport. They require protein channels (for facilitated diffusion) or active transport mechanisms.
4. Glucose: Glucose is a polar molecule and is too large to pass through the lipid - bilayer. It requires facilitated diffusion (using protein carriers) or active transport to cross the membrane, so it does not passively diffuse through the membrane in the simple sense.

Answer:

• Fatty acids
• Carbon dioxide