Practice problem
Which of the following best describes the permeability of the phospholipid bilayer?
The membrane is permeable, allowing all substances to pass into the cell.
The membrane is semipermeable, allowing some substances to pass into the cell.
The membrane is impermeable, preventing any substances from entering the cell.
The permeability depends on the type of cell it is.
Type a concept, like “slope” or “photosynthesis”.