The structure that regulates what enters and exits a cell is the cell membrane, also known as the plasma membrane. It is a selectively permeable barrier made primarily of a phospholipid bilayer, embedded with proteins that facilitate the transport of substances. This membrane allows essential nutrients to enter the cell while keeping harmful substances out, much like a door controls access.
A screen for a window. It keeps bugs and other bad things out and lets air in.
A selectively permeable cell is a cell whose cell membrane only lets in certain things like food but on the other hand tries to not letting things like viruses or bacteria all cells are semi or selectively permeable
You could use lots of analogies. Cell membranes keep the traffic of things going on in the cell. It also keeps stuff in or out. You could say it works like screen a door. Perhaps a better analogy is that the cell membrane is like a border (between countries). The cell membrane (much like the border guards) control the traffic in and out of the cell. A fun answer could be to compare it to a Club bouncer, that allows certain people in and blocks the entrance of others. Another analogy for a cell membrane is that it is like a sieve. That is because it lets smaller particles (like water) in, while stopping bigger particles that could cause the cell harm out.
Molecules can not pass through the cell membrane, because endocytosis is important for those large molecules that can not pass through the cell membrane!!
the cell membrane is like a guard because it only allows chemicals in and out of the cell
it is like a door it protects things or people inside it is like a door it protects things or people inside it is like a door it protects things or people inside
It's important for a cell to be selective, because it lets the good things in and not the bad things in, like the viruses.
Cell Membrane: A cell membrane works like a screen. It lets the good things in like nutrients and lets the bad things out like waste. It is like a sieve.Cytoplasm: Cytoplasm is the jelly-like part of the cell where the action takes place. It is where the nutrients are used.Nucleus: The nucleus is the brain of the cell. It controls the cell, and tells it what to do. The nucleus also contains the DNA which is like a blueprint. A blueprint is a plan that people use when they build. A cell's blueprint is the plan the cell uses when it reproduces.
A screen for a window. It keeps bugs and other bad things out and lets air in.
because it lets humans see small things like cell and blood
A selectively permeable cell is a cell whose cell membrane only lets in certain things like food but on the other hand tries to not letting things like viruses or bacteria all cells are semi or selectively permeable
A selectively permeable cell is a cell whose cell membrane only lets in certain things like food but on the other hand tries to not letting things like viruses or bacteria all cells are semi or selectively permeable
You could use lots of analogies. Cell membranes keep the traffic of things going on in the cell. It also keeps stuff in or out. You could say it works like screen a door. Perhaps a better analogy is that the cell membrane is like a border (between countries). The cell membrane (much like the border guards) control the traffic in and out of the cell. A fun answer could be to compare it to a Club bouncer, that allows certain people in and blocks the entrance of others. Another analogy for a cell membrane is that it is like a sieve. That is because it lets smaller particles (like water) in, while stopping bigger particles that could cause the cell harm out.
A door because the Cell Membrane controls what goes in and out of the cell, and so does a door. A door keeps things like wind and bugs out from coming inside, a door also saves you from losing cool air in the summer and heat in the winter.
A selectively permeable cell is a cell whose cell membrane only lets in certain things like food but on the other hand tries to not letting things like viruses or bacteria all cells are semi or selectively permeable
Molecules can not pass through the cell membrane, because endocytosis is important for those large molecules that can not pass through the cell membrane!!
the cell membrane is like a guard because it only allows chemicals in and out of the cell