Which of the following can diffuse between a membrane's phospholipids into the cytosol?
A)glucose
B)sodium
C)carbon dioxide
D)integrin molecule
E)a small secretory product

Question

Quizplus · Accepted Answer

Carbon dioxide is a small, nonpolar molecule that can easily diffuse between the hydrophobic fatty acid tails of the phospholipids in a membrane and enter the cytosol. Glucose and sodium are both polar molecules and cannot pass through the nonpolar interior of the membrane without the help of specific transport proteins. Integrin molecules are relatively large proteins that are embedded in the membrane, and secretory products may require specialized mechanisms for release from the cell.

Which of the Following Can Diffuse Between a Membrane's Phospholipids