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The plasma membrane is composed of a phospholipid bilayer and sterols (cholesterol) in between the layers. The phospholipids have a hydrophilic head with fatty acid tails, which are hydrophobic. The hydrophobic sides attract the other hydrophobic sides, forming a bilayer. The hydrophilic sides prevent other substances from entering the cell, thus generating a control for what goes in and out of the cell using protein channels. The cholesterol contributes to the flexibility of the membrane.
For a better picture of the model, go to this link. http://www.YouTube.com/watch?v=Qqsf_UJcfBc
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Why is the plasma membrane referred to as the fluid moasic model?
the plasma membrane is not rigid and the lipids in the membrane have the ability to move past each other slightly in order to facilitate the passage of certain compounds that need to be moving in and out of the cell.
What part of the cell is referred to as to fluid mosaic model?
The cell membrane or plasma membrane is often referred to as the fluid mosaic model. This is because it is composed of a fluid lipid bilayer with embedded proteins, giving it a mosaic-like appearance. The fluidity allows for the movement and exchange of molecules within the membrane.
Which of these materials is not a major component of the plasma membrane?
This membrane is called the fluid mosaic model as it is a mixture of phospholipids, cholesterol, proteins and carbohydrates. It is mainly phospholipids. The proteins sort of float on the surface of the membrane like islands in the sea.Cholesterol is also found in the membrane. It prevents lower temperatures from inhibiting the fluidity of the membrane and prevents higher temperatures from increasing fluidity.
Why the cell membrane is described asa fluid mosaic model?
fluid: as the phospholipid bilayer can move sideways freely within the plasma membrane mosaic: the pattern formed by the intrinsic and extrinsic proteins within the plasma membrane ** The molecules are like the tiles of a mosaic but rahter then being embedded in a solid cement-like material, they are embedded in a fluid and can move slightly to allow the passage of materials across the cell membrane and thus into the sytoplasm of the cell.
What does the cell plasma membrane in the cell?
The plasma membrane is somewhat like a filter system.It regulates the entry and exit of substances in and out of the cell.
What is the area between the nucleus and the plasma membrane that is filled with fluid-like gel?
Cytoplasm
Does the lipid portion of a plasma membrane act like a liquid at the temperature of the human body?
yes, it is fluid
Why is the plasma membrane referred to as the fluid moasic model?
the plasma membrane is not rigid and the lipids in the membrane have the ability to move past each other slightly in order to facilitate the passage of certain compounds that need to be moving in and out of the cell.
What part of the cell is referred to as to fluid mosaic model?
The cell membrane or plasma membrane is often referred to as the fluid mosaic model. This is because it is composed of a fluid lipid bilayer with embedded proteins, giving it a mosaic-like appearance. The fluidity allows for the movement and exchange of molecules within the membrane.
What term describes the structure of a cell plasma membrane because of its oily nature and embedded proteins?
The term used to describe the plasma membrane because of it's oily nature and embedded proteins is the fluid-mosaic model.The plasma membrane that surrounds each cell has two layers of phospholipids (fat with phosphorous attached).Each phospholipid molecule has a head that is attracted to water (hydrophilic) and a tail that repels water (hydrophobic) . Both the layers of the plasma membrane have the hydrophilic ends pointing to the outside forming the outer layer of the plasma membrane and the hydrophobic tails pointing inside and forming the inner layer of the plasma membrane.Proteins and substances such as cholesterol become embedded in the bi-layer of the plasma membrane giving it a mosaic look.At body temperature the plasma membrane has a liquid consistency like the vegetable oil and proteins and other substances are able to move across the plasma membrane. Due to this reason the plasma membrane is described using the term fluid-mosaic model.
Which of these materials is not a major component of the plasma membrane?
This membrane is called the fluid mosaic model as it is a mixture of phospholipids, cholesterol, proteins and carbohydrates. It is mainly phospholipids. The proteins sort of float on the surface of the membrane like islands in the sea.Cholesterol is also found in the membrane. It prevents lower temperatures from inhibiting the fluidity of the membrane and prevents higher temperatures from increasing fluidity.
How are algae and fungi like?
a plasma membrane
What does the plasma membrane do in the cell?
The plasma membrane is somewhat like a filter system.It regulates the entry and exit of substances in and out of the cell.
What does the plasma membrane in a cell do?
The plasma membrane is somewhat like a filter system.It regulates the entry and exit of substances in and out of the cell.
Why the cell membrane is described asa fluid mosaic model?
fluid: as the phospholipid bilayer can move sideways freely within the plasma membrane mosaic: the pattern formed by the intrinsic and extrinsic proteins within the plasma membrane ** The molecules are like the tiles of a mosaic but rahter then being embedded in a solid cement-like material, they are embedded in a fluid and can move slightly to allow the passage of materials across the cell membrane and thus into the sytoplasm of the cell.
What does the cell plasma membrane in the cell?
The plasma membrane is somewhat like a filter system.It regulates the entry and exit of substances in and out of the cell.
What molecules can freely cross the plasma membrane?
Proteins, Carbohydrates, and Cholesterol. (Check out, 'fluid mosaic')
