Question

what is plasma membrane plz tell ---?!!?​

Answer 1

$\large\underline{\pink{\sf \red{\bigstar} Concept\: Of\: Plasma\:Membrane:-}}$

• ◈Plasma membrane is the outermost layer in cells. It separates the content of cell from their external environment.

• ◈ It also allows the materials from cell to exit outside. It controls the entry and exit of materials in nd out of cell and hence it is called selectively permeable membrane.

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Answer 2

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The plasma membrane, also called the cell membrane, is the membrane found in all cells that separates the interior of the cell from the outside environment. ... The plasma membrane consists of a lipid bilayer that is semipermeable. The plasma membrane regulates the transport of materials entering and exiting the cell.

Membrane is a layer which acts as a selective barrier which means it does not allow all the materials to go in or out of the cell. It is usually made up of protein or lipids. Plasma is one of the states of matter like solid , liquid and gases. Hence the name.

The term 'Plasma membrane' was given by Pfeffer. It is situated just inside the cell wall and is also termed as cell membrane, plasma lemma or cytomembrane. The term 'Plasma lemma' was given by Plower (1931). Nageli and Cramer (1855) used the term 'Cell membrane'.