permeability

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

Characteristics of Diamagnetic, Paramagnetic and Ferromagnetic substances

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A) Diamagnetic Substances and its characteristics Diamagnetic substances are those substances which, in their normal states, have no magnetic moment at all. Antimony, Bismuth, Copper, Gold, Mercury, water, alcohol, Hydrogen are diamagnetic substances. Characteristics They are feebly repelled by magnet and magnetic field. When placed in a magnetic field, they all are weakly magnetized in … Read more