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A cell membrane is basically a double layer of lipids (fat molecules) with a bunch of proteins in it. Each fat molecule has two molecular "tails" that don't mix with water (just like oil doesn't) and one extremity that does. Because of this characteristic the part that does mix with water is facing outward (cells are immersed in water environments) or inward (cells are mostly water on the inside) and the double "tails" are sandwiched on the inside, there they don't come into contact with water, only with eachother and other molecules that don't mix well with water.
There are basically two types of protein that are found in the membrane:
- some that cross all the way through, called 'transmembrane'. These are able to do this because they, like the double layer of positionally opposite fat molecules, have one part that doesn't mix with water and two parts that do. Membrane pores for instance would be of this type.
- Some that are on the periphery of the double layer, either on the outer part or inner part, called 'peripheral proteins'. These mix with water and consequently they also mix well enough with molecules that mix with water.
What else can I help you with?
What is the outside of a plant cells called?
The cell wall :) was in my state standards book for 7th grade, so it must be right
Does human cells have a cell membrane?
Yes, human cells have a cell membrane. The cell membrane is a thin, semi-permeable barrier that surrounds the cell, separating its internal structures from the external environment. It plays a crucial role in maintaining the cell's shape, protecting its contents, and regulating the passage of molecules in and out of the cell.
What Controls what moves in and out of the cell?
Cell membrane
What controls the entering and leaving of a cell?
cell (plasma) membrane
Which contains the other cell membrane or phospholipid?
the cell membrane
Does the cell membrane keep materials from entering or leaving the cell?
yes, the cell membrane does keep material from entering or leaving the cell -karla cruz 7th grade
Do cell membrane have cells?
All the cells have the cell membrane. If you are in lower grade than 7th grade you didn't learn that.
What is the outside of a plant cells called?
The cell wall :) was in my state standards book for 7th grade, so it must be right
Does human cells have a cell membrane?
Yes, human cells have a cell membrane. The cell membrane is a thin, semi-permeable barrier that surrounds the cell, separating its internal structures from the external environment. It plays a crucial role in maintaining the cell's shape, protecting its contents, and regulating the passage of molecules in and out of the cell.
Is a cell wall a cell membrane?
No it is not. A cell wall is a rigid outer structure on a plant or algae cell. A cell membrane is a flexible outer layer on every cell, but doesn't provide much protection. answered by Shelby 7th grade
What boundary represents the cellular level between cells?
cell membrane
What type of cells have membrane?
The cell's membrane is "selectively permeable" because the cell allows some materials to enter or leave.I'm in grade eight. This is what my Science textbook says:"Because the cell membrane allows certain substances to enter or leave, but not others, it is said to be selectively permeable."
Structure of the cell body?
to my grade 9 knowledge the structure of a cell is made up of the nucleus and membrane as well as other organs that make up the cell.-
What Controls what moves in and out of the cell?
Cell membrane
Another name for plasma 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.
What is the thin flexible barrie around a cell?
The thin, flexible barrier around a cell is called the cell membrane. It controls the movement of substances in and out of the cell, helping to maintain the cell's internal environment and protect it from external threats.
What is the thin flexible membrane around all cells?
the cell membrane is as flexible barrier outside of the cell.
