It could be the cell wall? I"m not sure.
Yes, the cell membrane is selectively permeable, meaning it allows certain substances to pass through while blocking others. This is essential for controlling the movement of molecules in and out of the cell to maintain internal balance.
A key function of the cell membrane is to regulate the passage of substances in and out of the cell through processes such as diffusion, osmosis, and active transport. It also helps in maintaining the cell's shape and protecting its internal environment. Additionally, the cell membrane plays a crucial role in cell communication and signal transduction.
That's like asking why do we need skin or why do milk need cups or why bear needs skin. The cell membrane protects what is inside the cell and keeps it stable. Also, the cell membranes are selectively permeable and only not allows everything to let in the cell, but going back to the first reason, if cells did not have membranes, we would look like a slime.
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 as flexible barrier outside of the cell.
Cell waste
Usually, the membrane will burst and let its contents out into the cell membrane and get used up.
Yes
Cell membrance is a structure of cells
The purpose of the cell membrane is to let materials like nutrients in and materials like waste out of the cell. They act as doors for the cell.
A cell membrane is a selectivley permeable membrane. This means that it only lets specific materials get in and out of the cell. The cell membrane helps to let only needed materials into the cell and to get unneeded materials out of the cell. (food goes in waste comes out.)
It hold every thing together and has the same function as a cell membrane that means, it is surrounding the cell and deciding what to let into the cell.
yes
The function of the cell membrane is to let things in and out of the cell. It's like a gate to the cell. Prokaryotic and eukaryotic cells have cell membranes.
To let things through the cell membrane
no
the wall. it is necessary to only let things in and out based on what the nucleus of the cell wants. for example the cell membrane will only let sperm in until one has penetrated the egg, then the membrane stops trying to let sperm in.