Question

Explain fluid model model of cell membrane

Answer 1

Answer:

it is SODIUM POTASSIUM PUMP

Explanation:

it consist of a lipid bi layer in which phosphate molecules are embedded and it is used for the pumping of sodium molecules outside the body and potassium molecules inside the body

Answer 2

The model of cell membrane was given by Singer and Nicholson in 1972 . According to this model, the cell membrane or plasma membrane is bilipid layer having two types of proteins:

1) Peripheral or extrinsic proteins

2) Integral or intrinsic proteins

The intrinsic proteins are tightly held inplace by strong hydrophilic or hydrophobic interaction. It is difficult to remove intrinsic proteins from the membrane but the extrinsic proteins are superficial and can be removed easily .

Membrane of different cells are different in composition of protein and lipids. The membrane also undergoes various modifications to perform various physiological functions.

This model also says that central bilipid layer is phospholipid having spherical polar head projected outside and 2 non-polar tail grp projected inside.

• Acc. to this model,the structure of membrane is not static . Because of the fluidity of lipid molecules and scattering of protein molecules . This model has been named as 'Fluid Mosaic Model' .

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