semi-permeable membrane

Cell membrane: Structure and Functions

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It is a protective outer covering sheath that envelopes the cell body. It is known by other name called plasma lemma and plasma membrane. It separates extracellular fluid (ECF) which is outside the cell and intracellular fluid that is inside the cell. It is a semi permeable membrane as it allows exchange of certain substances … Read more

Osmosis: introduction, types and significance

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It is a special type of diffusion, which involves the movement of water through a semi-permeable membrane (differentially permeable membrane). The movement of molecules takes place from the region of higher concentration of water (dilute solution) to the region of lower concentration of water (stronger solution) until the equilibrium. It can also be defined as … Read more