The cell membrane lets substances in and out of the cell.
process of taking materials into the cell by means of infolding of the cell membrane
That description fits the cell's plasma membrane, which separates the cell from its external environment and regulates the passage of molecules in and out of the cell.
Nucleus in an animal cell is a membrane covered sack which contains the cell's DNA. The DNA is the boss of the cell, and has the directions for forming a new cell.
It encloses the cytoplasm, and is a protective barrier that controls what goes in and out of the cell.
Cell membrane
A cell membrane is also known as a plasma membrane or cytoplasmic membrane. The cell membrane separates the interior of a cell from its outside environment. The main function of a cell membrane is to protect the cell from its surroundings.
The cell membrane is a semi-permeable barrier separating the interior of the cell from the exterior which controls what substances can move in and out of the cell. The primary physical constituent or the cell membrane is the phospholipid bi-layer. "Floating" within this bi-layer are many different biological macromolecules including proteins and lipids. This description is often referred to as the "fluid-mosaic model." and has the shape of a penis
the cell membrane is as flexible barrier outside of the cell.
the cell membrane
cell (plasma) membrane
cell surface membrane cell surface membrane
The cell membrane is often referred to as "not just a bag but a fluid mosaic gatekeeper." This description highlights its dynamic nature, with proteins and lipids constantly moving within the membrane, allowing it to regulate the flow of molecules in and out of the cell. It serves as a selective barrier that controls the passage of substances into and out of the cell.