Name: Cell Membrane Transport
Uploaded: 2019-07-19
Duration: 10 min 50 s
Description: Substances move in and out of a cell through several different processes called membrane transport. Passive and active transport are two types of membrane transport.

Question

Complete the table below to compare cell walls with cell membranes.

Accepted Answer

Feature Cell wall Cell membrane

Is the thickness normally measured in nm or $n m o r μ m$ ? Micrometre ( $μ m$ ) Nanometre ( $n m$ )

Cell location The cell wall surrounds the plasma membrane. It is attached to the cytoplasm and separates the interior of the cell from the outside environment.

Permeability Freely permeable Selectively permeable

Fluid or rigid Rigid Fluid

The cell wall is thicker than the plasma membrane; thus, the width of the cell wall is measured in micrometre. The length is a cell wall is about 0.1 $μ m$ to several $μ m$ . The width of a plasma membrane ranges from 7.5–10 $n m$ . The plant cell wall is located between the plasma membrane and the cuticle. The plasma membrane is made up of a lipid bilayer that separates the interior of all cells from the outside environment. The cell wall is freely permeable, but the plasma membrane is selectively permeable, allowing the transportation of molecules through diffusion, osmosis, facilitated diffusion, and active transport. The cell wall is made primarily of a carbohydrate called cellulose. The cell wall is a rigid structure, while the plasma membrane is fluid because it is made up of bilayers of lipid.

Complete the table below to compare cell walls with cell membranes.

Important Questions on Cell Membranes and Transport

Learn and Prepare for any exam you want !