Why is it important for the cell membrane to be semi-permeable?
A phospholipid bilayer is a thin polar membrane made of layers of macromolecules. Each phospholipid has a (water-soluble) head and a (water-repelling) tail. The bilayer is arranged so that the heads face the interior and the exterior of the cell, and the hydrophobic tails face each other in the middle. The phospholipid bilayer is the main structural component of the cell membranes. It is considered a membrane to allow some ions through, but not all.
Base your answer to the following question on the diagram below which represents the fluid-mosaic model of a cell membrane.
The arrow points to a component of the membrane that is best described as a
Which diagram best represents the fluid-mosaic model of a cell membrane?
The diagram below represents a section of a plasma membrane
What does structure X represent?
Which set of functions is directly controlled by the cell membrane?
Molecules A and B come in contact with the cell membrane of the same cell. Molecule A passes through the membrane readily, but molecule B does not. Which statement could describe molecules A and B?
